Alleged Killer Clown Back in Court to Face Charges in 1990 Cold Case Slaying

Sheila Keen Warren and Marlene Warren
Marlene Warren answered the door to find a clown and was shot in the face. (WPEC/Washington County Sheriff's Office)

A woman charged with dressing as a clown when she allegedly murdered a romantic rival in 1990 was back in court this week.

Before a judge in West Palm Beach on Monday, Sheila Keen-Warren waived her right to speedy trial on Monday.

Watch: Victim Allegedly Killed by Woman Dressed as Clown Loved Clowns as a Child

Keen-Warren is facing charges for the death of Marlene Warren.

Back in 1990, detectives say Keen-Warren knocked on Marlene Warren's door while holding flowers and balloons.

The clown fired once, hitting the woman in the face. She died two days later.

The Palm Beach County Sheriff’s Office says Keen-Warren was having an affair with the victim's husband, Michael Warren, who she would later go on to marry.

Michael Warren has not been charged in connection with the killing.

The clown left the scene and drove off in white Chrysler LeBaron that was later connected to a car rental company that had ties to Michael Warren’s used auto dealership, investigators said.

Sheila Keen, then 27, worked for Michael Warren.

Prosecutors will seek the death penalty against the 54-year-old.

Watch: Prosecutors to Pursue Death Penalty Against Woman in 'Clown Killer' Case

Keen-Warren has pleaded not guilty.

“She vehemently denies her guilt and we’ll proceed as usual,” said defense attorney Richard Lubin.