Ex-Cop Who Had Sex With Supervisor While Her 3-Year-Old Daughter Was Dying In A Hot Car Gets 20 Years

A former Mississippi Gulf Coast police officer is headed to prison for the death of her 3-year-old daughter, who was left in a patrol car while her mom had sex with a police supervisor.

The Sun Herald of Biloxi reports ex-Long Beach police officer Cassie Barker was sentenced Monday to 20 years in prison in the 2016 death of Cheyenne Hyer. The 29-year-old pregnant woman pleaded guilty last month to manslaughter in a plea bargain after being indicted on a charge of second-degree murder.

Cheyenne was strapped in her car seat in the patrol car for four hours while Barker was with her then-supervisor, Clark Ladner. The car's air condition was turned on, but it wasn't blowing cold air. Cheyenne was unresponsive and had a temperature of 107 degrees when Barker returned.

Barker, who was working two jobs at the time, originally claimed she had been talking to Ladner at his house early on a hot weekday morning when she fell asleep.

Ladner and Barker were fired by the city of Long Beach within days. Ladner hasn't been criminally charged, telling officials he didn't know the girl was in the car. Reports at the time indicated Ladner told officials he had taken a sleep aid and also fallen asleep.

The mother had left her daughter alone in a car at least once before, at a store in nearby Gulfport in April 2015. Police responded and child welfare officials took temporary custody of the girl at the time. Barker was suspended from the Long Beach police for a week without pay. The girl's father, Ryan Hyer, said he was never notified of that first incident.

Cassie Barker reportedly developed post-traumatic stress disorder after leaving her 3-year-old daughter Cheyenne Hyer in a patrol car while Barker had sex with her co-worker, resulting in the child's death.  Photo: Hancock County Jail

"Every time I close my eyes, I picture her suffering and then I picture her laying in this coffin," Ryan Hyer said March 18, the date of Barker’s manslaughter plea. "I still see her smiling and laughing in my head and I would assume that smile and laughter turned to pain and suffering in that instance."

The father is suing the Long Beach Police Department and the Mississippi Department of Child Protection Services for the wrongful death of his child, saying the child welfare agency should have taken stronger action after the first incident.

"As a parent, you are supposed to protect your child, and Cheyenne is gone because her mother didn't protect her, not once but twice," Hyer said.

Barker herself was hospitalized after the girl's death for what officials described as shock. A psychological exam showed Barker suffered from post-traumatic stress disorder attributed to childhood trauma and her daughter's death. She was found competent to stand trial.