Man Pleads Guilty to Mount Pleasant Homicide

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Dedan Williams was initially charged with second-degree murder while armed for allegedly killing 38-year-old Andrew Tillman in the Mount Pleasant neighborhood of Northwest, DC. The 50-year-old defendant pleaded guilty to voluntary manslaughter while armed during a Feb. 8 hearing.

The two got into an argument in the third-floor hallway of an apartment complex at approximately 7:00 p.m. on Nov. 15, 2020. Williams pistol-whipped Tillman before chasing him down multiple flights of stairs with weapons in his hands. This caused Tillman to collide with multiple walls. Once outside, Tillman fell to the ground.

“While the decedent was on the ground, he slashed him twice,” the prosecutor said. “Responding officers saw the defendant outside the building with a gun in one hand and a knife in the other.”

As part of the plea agreement Williams took, parties agreed to recommend a sentence of exactly seven-and-a-half years in prison followed by five years of supervised release.

DC Superior Court Judge Rainey Brandt schedueld the defendant to be sentenced on April 13.

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