A teenager charged in connection with a 2011 murder and later released on bond was himself shot dead in the District Heights area Tuesday night, authorities said.

Police said Ronald J. Minor, 18, was found fatally shot in an apartment complex in the 1600 block of Addison Road South just after 8 p.m. Tuesday. Cpl. Larry Johnson, a Prince George’s County police spokesman, said homicide detectives had no suspects or motive in the case.

Minor, who lived about a half mile from the scene of his slaying, was charged along with three others last year in connection with the Nov. 15 slaying of 31-year-old Marvin D. Tomlinson, court records show. He was released on $75,000 bond in that case in January, the records show.

According to police charging documents, the incident started when Minor and several others tried to rob a group of six people in the 2100 block of County Road in District Heights. Minor and the others forced the six people onto the ground at gunpoint and starting taking items out of their pockets, according to the documents. But Tomlinson fought back — rushing a person in Minor’s group — and he was fatally shot.

Minor, who was charged with first-degree murder and other related counts, is not believed to be the shooter, court records show. According to police charging documents, the other robbery victims were able to identify him as their attacker from a photo lineup.

Johnson, the police spokesman, said he was unsure whether Minor’s slaying had any connection to the earlier killing for which he was charged. Robert C. Bonsib, Minor’s attorney, said that a homicide detective had called him about the case, but he declined to comment further as not to hinder the investigation. He said that in his dealings with Minor, “he appeared to be a nice young man.”

“I think it’s an unfortunate situation, and I think it’s tough for the family,” he said.