Delco Biker Gang Member Convicted Of Murdering Prospective Member

DELAWARE COUNTY, PA — A Delaware County motorcycle gang member has been convicted of murder, abuse of a corpse, gun crimes, and more in connection with the killing of a prospective gang member, also from Delaware County.

Philadelphia District Attorney Larry Krasner said Michael DiMauro, 51, of Secane, was found guilty by a jury of the murder of 33-year-old David Rossillo Jr., who was last seen alive in December 2017 and was a prospective member of the Warlocks, which DiMauro belonged to.

DiMauro was convicted of all charges, including first degree murder, conspiracy, abuse of corpse, and related firearm charges.

The verdict was handed down in just a few hours' time.

According to authorities, DiMauro met Rossillo, a prospective member of the Warlocks, at Mt. Moriah Cemetery in Southwest Philadelphia after gaining access to the cemetery with the assistance of a co-conspirator who served on the cemetery's nonprofit board.

DiMauro shot Rossillo multiple times, tied a rope around Rossillo's neck, and then dragged his body to a crypt using a vehicle before prying open the crypt and dropping the body inside.

Two cooperating witnesses implicated DiMauro in the murder.

On April 3, 2020, investigators found the crypt and discovered not only the remains of Rossillo, but the body of 36-year-old Keith Palumbo, a musician from Delaware County.

DNA taken from the remains led to the official identification of Rossillo and Palumbo in August 2020.

DiMauro was arrested in May 2020.

Michael DeLuca, another Warlocks gang member, was arrested in 2021 and pleaded guilty to third degree murder in Palumbo's killing in January 2023.

Three other co-conspirators pleaded guilty for their roles in helping dispose of the bodies.

Motives for both killings are unknown.

DiMauro was sentenced to life in prison without the possibility of parole on Aug. 4.