Johnathan Frederick Dawkins arrested for killing Dwayne Brisbon

Dwayne Brisbon was slain in May. Police announced Thursday that they arrested a suspect in his slaying.

Police arrested a man suspected of stabbing to death a 33-year-old father of a young child who worked as a technician at MedStar Washington Hospital Center.

MPD arrested 30 year-old Johnathan Frederick Dawkins of Southeast, D.C. on Thursday and charged him with murder two in connection with the May 1 slaying of 33-year-old Dwayne Edward Brisbon.

Police say Brisbon appeared to simply be a good Samaritan who came up on an argument between two people on the sidewalk.

"He stopped his vehicle and asked if the person was ok, and at that time there were some words exchanged and he got out of his car and then he was stabbed,” says Lieutenant Robert Alder of MPD’s homicide division.

Brisbon was found unconscious in May inside a vehicle that had crashed into a restaurant near the intersection of 5th Street and Florida Avenue. Authorities say the Brisbon, an Upper Marlboro resident, had stab wounds to the neck.

He was pronounced dead at a hospital.

Brisbon was a CT Scan Technologist at MedStar Washington Hospital Center and was named a "SuperStar" at the hospital in 2009 for his exceptional work and dedication to patients. He worked at the hospital for 12 years.

In his Upper Marlboro neighborhood he was known simply as a good guy who liked motorcycles.