Acting on information from a city fireman, D.C. police chased a murder suspect briefly through a downtown section of the city early yesterday before cornering him in an alley and arresting him on charges of stabbing another man.

Mark S. Hawkins , 18, of no fixed address, was charged with homicide in connection with the death of Larry Gladden, 22, also of no fixed address, according to police.

Gladden's body was found with multiple stab wounds in a hallway on the third floor of a vacant building at 724 11th St. NW after police from the 1st District had been summoned to the scene by a 7:30 a.m. telephone tip to the police dispatcher.

Police said the call came from D.C. fireman who had been told about the body - and also given a description of a man seen leaving the building by ladder - by nearby residents.

Police said the caller told them the body was in the boarded-up building in a third floor section that could be reached only by a ladder already in place and apparently used by others to enter the premises.

There were two cots on the third floor of the building and police theorized that both Hawkins and Gladden had been sleeping there.

Nearby residents reported seeing a man climb down the ladder from the homicide scene wearing a green sweatshirt that was hooded, according to police, and shortly afterward an officer from the 1st District spotted a man fitting that description.

The officer, Witzel C. Jackson, approached the suspect near New York Avenue and 13th Street NW and, when he ran, pursued him across a parking lot and into a dead end alley off 14th Street NW. Police said Hawkins was carrying a bag containing a bloodied pair of pants. They speculated that he changed out of them in the men's room of a downtown bus terminal.

Police said Hawkins told them he had just been discharged from the Navy as a conscientious objector.