Man who killed ex-wife during drug-induced hallucination is sentenced


Nick Perez

A 60-year-old Claymont man was sentenced Friday for killing his ex-wife during a drug-induced hallucination.

A New Castle County Superior Court judge gave Joseph Slider 20 years in prison for killing Mary Ellen Slider while they were both high on PCP (phencyclidine) at his apartment.

In November 2018, Joseph Slider began to have hallucinations and believed the television program they were watching was real, and that 59-year-old Mary Ellen Slider, of Folsom, Pennsylvania, was a character on the program who killed his character’s mother, according to court documents.

Delaware Department of Justice said he took his .22-caliber revolver and shot her multiple times, including twice in the head.

Court documents said Joseph Slider then told a neighbor about the killing before calling the police.

Police found Joseph Slider sitting inside a vehicle. Mary Slider's body and the revolver were in the apartment when they arrived, court documents said.

He was charged with first-degree murder, possession of a firearm during the commission of a felony and possession of a firearm by a person prohibited.

In November 2019, he pleaded guilty to second-degree murder and possession of a firearm during the commission of a felony.

Have a court or data story idea? Contact Nick Perez at (302) 324-2856, or Twitter @nickdnperez.

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