DALLAS—It’s been almost six months since D’Lisa Kelley died. She’s the pregnant mom found strangled and beaten to death in an abandoned home back in March. Kelley’s sister says she called D’Lisa, and heard her sister in a confrontation with a man. That’s when she called 911. A week later, D’Lisa’s body was found. Family members believe if the Dallas Police Department acted on the call, instead of waiting a week to file a missing persons report, that D’Lisa would be alive.

Now they’re calling for the termination of Dallas Police Sergeant Kevin Mansell. Mansell is the officer in charge of the 911 dispatch. Earlier this year he was reportedly put on administrative leave, after an investigation was launched into Kelley’s death.

“We feel that it is sort of disrespectful for the Dallas Police Department to put a person on a one day suspension resulting that someone actually lost their life,” Dominique Alexander said. Alexander is the president of the Kelley Alert Foundation. “We’re asking that the Chief of Police please remove him from the department, immediately.”

Kelley’s family wants something good to come out of her death. They introduced The Kelley Alert, which would require law enforcement to respond more aggressively to 911 calls on missing persons and to trigger citywide searches within 24 to 48 hours after receiving the original 911 call.

“So what we want him to do, and we want the public to surround us — we want Sgt. Kevin Mansell fired,” Alexander said.