A 32-year-old Baltimore man, wanted in connection with the Dec. 2 shooting death of a caretaker at a Bethesda mansion, was arrested in Baltimore last night after he ran from police into an apartment building and held out for seven hours before surrendering.

Baltimore police identified the suspect as Vernon Morgan, who was being held at a northwest Baltimore police station on a murder warrant issued on Dec. 5 by Montgomery County police.

Morgan is the fourth suspect arrested in the slaying of Din Chia Wang, a caretaker at the Bethesda home of Washington land developer Samuel Gerstenfeld. Three other men were arrested at a Washington motel on the night of slaying.

Police said Morgan and the others had entered Gerstenfeld's Georgian-style home and confronted Wang and his wife in the servants' quarters. When Wang refused to give them money, Montgomery County police said, one of the intruders shot him in the head.

After that shooting police said, the suspects entered a house several blocks from Gerstenfeld's bound and gagged an elderly couple and fled several hours later in the couple's 1978 Cadillac.

Baltimore police said Morgan was spotted by an undercover police officer about 4 p.m. yesterday in northwest Baltimore.

When a uniformed officer approached him, Morgan tried to run him down with his car and then drove away, police said. Several blocks away, Morgan abandoned the car and ran into an apartment building.