David Muir explores how advanced forensic DNA technology has brought long-overdue justice to two murder cases that had gone unresolved for decades.

A federal judge awarded nearly $2 million in damages after determining that an FBI agent was negligent when he shot and killed a kidnapped Texas man during a botched rescue effort.

The mother and son of Ulises Valladares were awarded the money as part of a civil lawsuit filed in Houston federal court.

The judge found that the agent was negligent in his response and ruled that he was the sole cause of Valladares' death.

The agent was protected by qualified immunity, but the case was allowed to proceed against the federal government.

Former Houston Police Chief Art Acevedo disputed the agent's explanation for the shooting.

Detective Joseph Azcona was shot and killed in Newark, New Jersey, while another detective was injured.

The 14-year-old suspect is expected to recover and has been charged with murder, attempted murder, and possession of illegal weapons.

The shooting occurred near Carteret Street and Broadway.

Azcona was unable to exit his vehicle before being shot and later pronounced dead at University Hospital.

The injured detective is recovering from significant injuries.

Authorities are working to bring those involved to justice.

Governor Phil Murphy and the New York Police Department have expressed their condolences and support for the Newark Police Department.