The First 48 Presents: Homicide Squad Atlanta

On the one-year anniversary of Bridget Shiel’s brutal murder, with no progress on finding her killer, Lowe organizes a vigil and canvass to try and generate new leads and give her family some resolution. A tip leads detectives on a wild hunt to try and find her killer. The best evidence they have is the hope of getting a DNA match. Meanwhile, Det. Zimbrick gets a DNA match on a 16-year-old cold case. He and Quinn head to San Francisco where the suspect is incarcerated and get a series of extraordinarily lucky breaks along the way.

A DNA hit in the Bridget Shiel murder investigation identifies a compelling new suspect who was recently imprisoned for a double homicide - Christopher Spencer. Lowe investigates Spencer's background, criminal history and cell phone records in the wake of Bridget's murder, sending him to Arkansas to speak with Spencer's family, and ultimately to the prison where Spencer is held to interview him face-to-face. Meanwhile, Benton investigates the death of a young man, shot and killed while selling water on a hot summer day.

A woman is found naked and strangled to death in an abandoned house; the investigation into the crime reveals more disturbing facts.

When a young man is shot from 235 feet away, Detective Darrin Smith discovers an escalating feud that threatens to tear apart a neighborhood.

When a young father is ambushed by a pack of brazen shooters, Detective Summer Benton uncovers the shocking reason for his murder.

A woman is found dead in a garbage can; a young man is ambushed by neighborhood bullies.