In Miami, Detectives Anthony Reyes and Manny Castillo investigate a man shot dead on a residential street. The case takes a turn when they learn that the house he was found in front of is where his ex-girlfriend lives. Then in Birmingham, a gunfight at a gas station leaves one man dead.

In Birmingham, Detective Chris Anderson investigates the gruesome murder of a woman who is shot to death and then set on fire. Anderson hunts down his suspects, but it's the victim's family that reveals a final, disturbing twist in the case. In DeKalb County, Detective Joe Renaud is working the homicide of a father of four, gunned down outside an apartment complex on the east side of town.

In Miami, two men are found beaten and shot behind an abandoned house. As Det. TC Cepero digs deeper into the case he unearths more than one reason the men could have been killed.

In Harris County, Deputy Abraham Alanis is working the homicide of a 69-year-old Navy veteran. When Alanis' first big break, surveillance video of the potential perpetrator, fails to show the suspect's face, investigators take a closer at the footage and notice something big--a small detail in the video, could be a huge break for the case.

In a quiet suburb of Birmingham, AL an unidentified man is found dead in an alley--the victim of a hit and run. On the scene detectives find a piece of the car that ran over the victim. In DeKalb County, a 24-year-old man is shot to death in his apartment during a drug deal. When a canvas provides no clues detectives turn to the victim's cell phone to point them in the direction of the killer.

In Miami, the Homicide Unit responds to a scene to find the 911 caller covered in blood and a 35-year-old woman brutally stabbed. And in DeKalb County, Det. Joe Renaud and his team are working the shooting murder of a 22-year-old man. With no witnesses, the team hopes piecing together the last hours of the victim's life can lead them to the killer.

In Harris County, a family man is shot down in his driveway. With no motive or witnesses lead investigator Deputy Juan Viramontes hopes a clue found on the victim's car can lead to the killer. And in Miami, as a family settles in for the night, gunshots erupt in their front yard. A startled mother walks outside and discovers her son shot dead.

In Miami, lead detective TC Cepero investigates the murder of a 20-year-old male, gunned down in the middle of the street in broad daylight. With surveillance video of the suspect and possible witnesses they learn the victim may have been on the killers hit list. in DeKalb County, a 20-year-old man is shot dead while walking his girlfriend home at night.

In Birmingham, a 49-year-old man is beaten and shot in the middle of a housing complex in broad daylight. In a community where no one wants to be seen as "snitching," finding someone to come forward with information will be Det. Chris Anderson's biggest challenge. In DeKalb County, lead detective Chris Franklin investigates the murder of an 18-year-old male, gunned down in an apartment complex.

Birmingham Detective Warren Cotton investigates the murder of three family members, including a 12-year-old girl, who were stabbed to death in their home and then burned. In Miami, Detective Ricardo John and his team are working the shooting of a young man who has been a witness in several previous homicide investigations.

Miami detective, Fabio Sanchez and the homicide team investigate the murder of a man stabbed in the street. In Dekalb County, Georgia, shots are fired in broad daylight on a residential street, leaving one teenage boy dead and another critically injured.

In Louisville, Det. Kristen Downs responds to the killing of a man shot while answering his door. Before he died he told his fianc e who did it, but his declaration leaves more questions than answers. Then in Harris County, TX, neighbors find a teenage girl in the woods, shot dead. The case takes a turn when the trail of clues leads Dep. James Cassidy to one of the victim's friends.

In Birmingham, AL, an innocent man is shot and killed in crossfire from a shoot out that erupted at a friendly dice game. Detective Jerry Williams and his team must first locate the shooters involved and then decide who and what to believe from the conflicting interviews.

In Harris County, Deputy Jason Brown and the homicide unit investigate the cold-blooded murder of a 15-year-old boy who was stripped down and shot during a home invasion.

In a remote area 20 miles east of Houston, a man walking in the woods discovers a startling sight--the remains of decomposed body hidden in the foliage. In one of his most challenging cases, Dep. Dennis Wolfford must first identify the body, before he can even begin unraveling the mystery of who to put it there.

In Birmingham, lead Detective Henry Lucas is working the brutal stabbing of a young mother killed in her own bedroom. With no obvious motive, the investigation hits a wall until Lucas discovers the victim is missing a diamond ring. Meanwhile, the Harris County Homicide squad and lead investigator Sgt. James Dousay are hunting the killer of a man found shot to death in his car.

In Miami, ten days before Christmas, a young corrections officer is shot dead with her two-year-old son while sleeping in their bed. Det. Kevin Ruggiero and Sgt. Ervens Ford take the case personally--not only do they consider the victim 24-year-old Ciara Lee as "on our team", but the death of her baby boy hits them emotionally.

In Birmingham, Detectives Eric Torrence and Henry Lucas investigate the murder of a 31-year-old male found dead in a field. But with a tight-lipped community where street law is paramount, finding someone to talk is the team's biggest challenge. As the clock winds down, will the community pull through and bring the killer to justice?

When a fight at a Charlotte nightclub escalates to gunfire, an innocent bystander is killed in the crossfire. Detective Terry Brandon and his team are forced to pit brother against brother to solve the murder. And in Harris County, Deputy Dennis Wolfford responds to the shooting of a young man at an apartment complex.

In Las Vegas, NV, Detective Jimmy Vaccaro and his team are called out at midnight to an empty desert highway, where a man's been shot dead in the middle of the road. From the victim's cellphone, they quickly get a lead: just minutes before he was killed, he received a call from a friend with whom he worked at a local strip club.

In a bloody convenience store shooting, Birmingham Detective Chris Anderson needs an old surveillance system and cooperation from the victim's mother to help solve the case. When a Miami shooting follows a brutal public attack, Det. TC Cepero and his team try to piece together the turn of events to determine if the murder was justified.

When Louisville Detectives Mickey Cohn and Jon Lesher discover that their two murder victims have matching tattoos, they suspect the murders might be related. When they learn the victims' missing friend might be a third victim, they race against the clock to solve the case.

Two men are found shot in a motel room in Charlotte, NC. Detective Terry Brandon and his team catch the alleged gunmen quickly, only to discover that their investigation is just beginning. Then in Miami, Detectives TC Cepero and Fabio Sanchez respond to an apparent suicide. But an examination of the body leads them to suspect foul play.

After a year with the gang unit, Detective Kevin Ruggiero returns to Miami Homicide, investigating a drive-by shooting that left two men dead. He has little to work with until he learns that one of the victims was a founder of a local gang.

In Louisville, Det. Kristen Downs is at a dead end in her search for the killer of a wheelchair bound man, until she discovers the victim's sons might be the key to the case. And in Charlotte, Det. Todd Burkard and his team find a man stabbed to death in his car.

In Charlotte, rookie homicide Det. Brian Whitworth is assigned his first case when a woman is discovered on her bedroom floor, stabbed to death. Hampered by false leads and a lack of eyewitnesses, Whitworth must rely on the physical evidence to bring the killer to justice. Meanwhile, in Louisville, Det. Jon Lesher investigates the homicide of a 43-year-old father, gunned down in front of his house for telling a rowdy group of men next door to quiet down. The case comes to a standstill when an eyewitness steadfastly upholds the street's code of silence. Lesher must use his veteran-interview techniques to break the code and get the witness to talk.

In Charlotte, when a store clerk and father of three young children is shot in a robbery by a masked man, lead Detective David Osorio and his team interview witnesses and find that no one knows the shooter. With little to go on, Osorio must find a way to identify his suspect before he can hope to track him down.

In Detroit, Sgt. Ernest Wilson and his team investigate the double-homicide of two twenty-six-year-olds, shot execution-style in the basement. When investigators find a slip of paper at the crime scene, it initiates a manhunt that sends investigators to the other side of the country.

The Miami homicide team is investigating the murder of a man found naked, tied up, and floating in Biscayne Bay. Investigators scour the shoreline in search of clues and follow a lead into the heart of a homeless encampment known as "Waterworld." The case takes an unexpected turn when the body of another man is found floating in the Bay three days later.

In Charlotte, rookie Detective Norma McKee gets her first double-murder: a young couple shot in their car by a backseat passenger. Inside the vehicle, detectives find what may be a vital clue, a baseball hat that might contain the suspect's DNA. Meanwhile, seasoned Miami detective, Emiliano Tamayo has two cases in two days.

When the Shizz, creator of a popular Louisville dance, is gunned down, Detective Brenda Westcott attempts to solve the case despite a potentially unreliable witness. Meanwhile, after a deadly shootout on the streets of Overtown, Miami Homicide Detective TC Cepero needs to figure out who fired first.

In Harris County, TX, a young man is days away from testifying as a witness in an aggravated assault case when he is suddenly gunned down near his home. As Sgt. Ron Hunter and the homicide team investigates, they learn the murder may have been part of an elaborate plan to keep the victim from getting on the stand.

When fire fighters in Detroit respond to a house fire and discover a 63-year-old woman stabbed and bound, Sergeant Kenny Gardner and Investigator Barbara Simon must investigate the brutal murder. With no witnesses, they have to rely on the local community to help them find her killer.

When a man arrested for a domestic dispute claims his boyfriend killed someone seven months earlier and buried the body in the basement, Louisville Detectives Jon Lesher and Collin King are launched into one of the strangest cases of their career.

In Birmingham, lead Detective Mike Allison is working the murder of a man found shot in the basement stairwell of a house. Allison and his team quickly find an eyewitness and then the suspect. The case seems closed, when suddenly it unravels after the eyewitness disappears and Allison is forced to set his suspect free. A year passes, when out of the blue, the case takes a surprising turn.

In Miami, Det. Frank Sanchez responds to the murder of a retired Miami Police captain, shot in broad daylight at a marina on the Miami River. When initial leads run dry, Miami PD launches a massive investigation, tracking the alleged killer all the way to New Jersey.

In Miami, Detective Anthony Reyes and the homicide team are investigating the murder of a man found brutally beaten to death below a major interstate. Reyes must navigate through false leads and dead ends, until an eyewitness comes forward and ignites the case. When detectives discover that their eyewitness is leaving out one major detail in his story, the case is turned on its head.

In Louisville rookie homicide detective Collin King is assigned his first case when an unidentified man is found dead near a railroad track. With no witnesses King tries to uncover a lead from the victim's friends and family and learns that sometimes a killer may be closer than you think.

In Detroit, Sergeant Matthew Gnatek and Officer Nancy Foster are investigating the murder of a soon-to-be father, found shot to death in a deserted field during a snowstorm.

In Harris County, Dep. Abraham Alanis and his team investigate the murder of a man, married with four young children, who was found robbed and shot to death outside an abandoned house. With no other leads to go on, investigators discover that their victim held a secret that could lead to his killer.

In Harris County, Deputy Russell Gonzales races the clock to track down the killer of an unidentified man found dead in a desolate field on the side of the road. It's an uphill battle for the team until a couple appears on scene and breaks the case wide open.