Pennsylvania Man’s ‘Sinister’ Words Before Injecting Lethal Fentanyl Into Police Informant Exposed in Court

A Pennsylvania man has been sentenced to up to 100 years in prison after he brutally murdered a police informant and disposed his body by throwing it off a bridge. The man is accused of beating the informant to death, injecting him with fentanyl, and then discarding his body from a bridge.

A 28-year-old man from Pennsylvania, Steven Gaddis, pleaded guilty to third-degree murder on March 27. Gaddis also pleaded guilty to conspiracy to commit third-degree murder, aggravated assault, kidnapping, and intimidation of a witness, who was a police informant, in connection with the 2024 death case of 25-year-old Mathew Whisman, according to reports from WHTM.

Gaddis, along with the victim’s cousins, Alexander Whisman and Jeromy Absher, were arrested in October 2025. They were accused of killing Whisman after he agreed to cooperate with police in a Maryland shooting investigation that took place in January 2024.

Whisman arrived at home in East Drumore Township, located 65 miles West of Philadelphia, on April 3, 2024. Gaddis reportedly went through Whisman's phone and discovered a message indicating that he was cooperating with law enforcement, according to the court documents.

After the discovery, Gaddis and the two men, 25 years and 17 years old, dragged Whisman into a bathroom and beat him until he was unconscious. After knocking him out, the trio forced him to take a shower to wash away any evidence.

The men then took Whisman to the basement and fed him, when Gaddis allegedly approached Whisman and asked, "How would you feel if it was your last supper?” This reportedly caused Whisman to drop his head and weep, according to court documents.

Gaddis then prepared two syringes of fentanyl, and the three men forced Whisman into a vehicle and injected him with a lethal dose, according to the Lancaster County District Attorney’s Office. The men then allegedly tossed Whisman's body over a bridge.

Authorities reported that before the killing, everyone except Gaddis left their phones at home, according to WHTM. State police received a missing person’s for Whisman in July 2024.

As the investigation unfolded, a witness told investigators that he knew something horrible had happened to Mathew Whisman, and that Alexander Whisman, Absher and Gaddis were responsible for his death, according to officials.

A camp counsellor discovered Whisman's remains in August 2024, on the bank of a creek near a hiking trail in Cecil County, Maryland. All three suspects were charged in October 2024 with 11 offences, including murder, kidnapping, facilitating a felony and intimidation of a witness.