Newark, New JerseyNewark, N.J., may be one of America's oldest and most diverse cities, but it's also one of the most dangerous; in 2007, the violent attacks of four college students by a ruthless gang of teenage killers would prove just how deadly the city could be.

As much as the glitz and glam of Tinseltown are intertwined into the fabric of Los Angeles, so is the LAPD; when one of the force's own goes on a deadly shooting rampage, the violent killings bring both the city, and the LAPD, to their knees.