Five cab drivers have been murdered, and the only thing Hawk can find that they had in common is that they all had pre-teen daughters.

An autistic teenage girl is the only witness to the murder of a cop. The killer knows that she saw him, but does not know that she is unable to speak and thus cannot identify him.

Hawk looks for answers when an artist is framed for murder.

A psychopath who has already killed several people holds the customers of a bar as hostage.

Hawk works undercover by pretending to be on the take in order to smash a heroin selling ring, unaware that his assignment is made more precarious by some of the other people who the ring has working for them.

Hawk and two of his fellow lieutenants are determined to locate $750,000 that a man was sentenced to jail for stealing, and to do that they keep an eye on the man's wife. But they are not the only ones determined to find the money.

Hawk's old friend Ulysses was murdered in his apartment building; it is up to Hawk to find out who was responsible.

An informant insists that he is being targeted for murder, and Hawk starts to believe him, but he can't get others on the force to take the man's claim seriously.

A very popular model is murdered at a crowded party, but no one can tell who shot her, even Hawk, who was at the scene.

A maniac is trying to extort money from a renowned stage actor by threatening to kill an innocent person if the actor does not pay him a large sum of money. Unfortunately, he has already made good on his threat twice.

Hawk catches a crook known to have friends in the political arena. 

A brokerage firm is robbed of a million dollars worth in securities, and Hawk is sure an employee of the firm knows more than she is telling.

Peter Jannus' new bride is killed in a hit and run by slick con man Nick Serri, and it's up to Hawk to prove Serri's guilt.

Hawk is on the hunt for a beautiful woman kidnapped off the street and held captive by the disgruntled ex-coworker of her boyfriend.

Nick Weller is the prime suspect in a murder, and the search is on for his alibi, a married woman being blackmailed for her liaison with him.

The murder of a bookbinder, who was working on a wealthy client's chronicles, is somehow tied in with a young woman who Hawk is starting to become romantically involved with.

Religious fanatic Houston Worth is the missing link between the murder of an office worker and the threatening telephone calls received by a young fashion model.