In Albuquerque, NM, loving father and former firefighter Don Fluitt is found dead inside his home with no suspect in sight. Fluitt's body is found by coworkers who went to check on him when he didn't show up for work, and body camera footage captures the crucial moments after his remains are discovered. Investigators are left to figure out the motive behind his killing, working through a list of possible suspects, which include Don's family, landlord, and his ex-wife's new husband. Police make progress when they discover a chilling surveillance video that captures the killer on camera, but is it enough to solve this heinous crime?

One Sunday afternoon in Bellaire, Ohio, Cheri and David Kinney were visiting their friend, Brad McGarry, when they discover him shot in the head, execution-style. Law enforcement arrives on the scene and immediately begin to hypothesize possible motives behind the murder: a robbery gone wrong, a hate crime, or lover's quarrel. As they try to narrow down their leads, detectives interview Brad's family, friends, and acquaintances. Each interview slowly reveals more pieces of the puzzle, leading directly to a caught-on-camera confession.

A mysterious body is discovered in the woods near a mobile home park in Port New Richey, Florida. After some process of elimination and discovery of evidence, the body is identified as Judy Therianos. Investigators at Pasco County Sheriff's Office make a break in the case after uncovering surveillance footage from a liquor store, where Therianos and an unknown male are seen together. This unknown male quickly becomes the prime suspect, but as the detectives continue their investigation, three people come forward and disclose information that leads to an arrest.

Retired Pasco County Pastor and avid coin collector, Billy Shuler, was reported missing by his wife after he went out one morning to meet with a prospective client and never returned home. A search is immediately ordered, and detectives find Schuler's abandoned van in an industrial parking lot, wherein the van's GPS system leads to the body. But even though progress was being made, the case went cold. After a year, police find an unlikely connection between several bank robberies and Shuler's murder, leading to the final conclusion of the case.

Beverly Puccio is found murdered in her home, and her ex-boyfriend is pegged as the culprit. He displays odd behavior when the police arrive to investigate, leaving them to question the true identity of her murderer. Bodycam video, original audio, and interrogation room footage show detectives swiftly piecing together the last night of Beverly's life. They track her encounter with a mysterious stranger at a bar, their flirtatious time together, and their cab ride toward her home. Detectives also discover additional clues that lead them to the identity of the mystery man, but conflicting evidence makes it hard to pinpoint the murderer.

Michelle Kinney is a free-spirited, trusting and generous mother of two boys in the town of Dubuque, Iowa, who is loved by the entire town. When her battered and bloody body is discovered in her apartment, the community is left numb with shock. Investigators discover that Michelle often took in people who were going through tough times and needed a place to stay for a few nights. This leads them to question if her generous spirit contributed to her death. And what detectives unearth staggers citizens, friends and family alike.