Appearances
The body of a nine-year-old beauty pageant contestant is found raped and murdered on a bus, but the case goes beyond the killer when it leads detectives to a virtual-pornography website.
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S4 E1
Chameleon
The detectives are on the trail of a recently paroled rapist responsible for the murder of a prostitute during a raid at a men's club and are called to the scene where he was shot in self defense by his own gun. However, the murder weapon was also used in another crime while he was still in prison, leading the detectives to investigate the victim through a trail of previously unsolved cases, a spending spree and another victim. They uncover a more serious criminal in the process.
S4 E2
Deception
A family portrait painted by a kindergartner leads the detectives to investigate her mother for child sexual abuse of her teenage stepson. When the boy's father is found murdered, the focus of the investigation shifts to the boy -- and his stepmother goes to great lengths to protect him and prevent the detectives from learning the truth.
S4 E3
Vulnerable
When an elderly woman with Alzheimer's breaks into an apartment, the detectives discover she had been abused, triggering memories of similar crimes from her childhood. They discover that she had been released from a nursing home to the custody of her financially scheming son who becomes the prime suspect. However, they go back to the nursing home to find a pair of suspects; the real crime is what's being done to the elderly.
S4 E4
Lust
A public health doctor, the wife of a retired attorney, who tracked HIV cases is found murdered and raped in Central Park. Her work involved contacting sexual partners of HIV patients which gives the detectives a long list of suspects and the detectives try to link threatening phone calls to the crime. The discovery of a second body in Central Park with the same signature shifts the focus to a possible serial killer.