The body of a 30-year-old Metro bus driver, shot in the head, was discovered early yesterday morning lying in the middle of the street in front of his apartment building in Lanham.

Prince Georges's Country police detectives yesterday were calling the slaying of Ronald Marshall Rogers of 9901 Good Luck Rd. a "real whodunit" with no motive and no suspects.

Rogers was found lying in a pool of blood next to his car, which was parked on Good Luck Road, according to police. The body was discover a few minutes after midnight by an off-duty U.S. Park Police officer and his wife, according to police and a neighbour.

David H. Morse, a neighbor of Rogers, whose telephone the off-duty officer used to call the police, said yesterday the dead man's head was propped against the lower part of the door on the driver's side of the car. "He had what looked like a gash across the bridge of his nose from cheek to cheek," Morse said.

Rogers lived just off Greenbelt Road, according to police. His apartment was in a cluster of mediumsized apartment buildings known as the Glenn Dale Woods Apartments.

Rogers worked out of the Bladensburg division of Metro, according to Metro spokesman Cody Pfanstiehl. A Metro employe since May 1976, Rogers worked nights and was to have reported to work again at 1 p.m. yesterday.

Morse, who said he did not know or even recognize Rogers, said that the area had experienced vandalism by juveniles, including apartment storage areas broken into and windows shot out by BB guns. Morse also said that he and his wife had heard what they believed to be gunshots in the area on previous occasions. Last night, he heard nothing, Morse said.

He said the car next to which Rogers was found had been parked next to the curb, so that Rogers' body was found in the middle of the street, next to tbhe driver's side.