Montgomery County investigators said yesterday the discovery that two recent slaying victims were friends has added to the possibility that the killings were related and that the same assailant or assailants may have been involved.

Police still have no motive for the deaths of Keese Milford, 67, and Raphel Darryl Sampson, 24, whose bodies were found half a mile apart, in wooded areas in the northeastern part of the county.

Sampson's body was found off Avoca Lane in Spencerville by a nearby resident on Wednesday. Police spokesman Phil Caswell said Sampson apparently had been shot with a handgun elsewhere, and his body then dumped at the Spencerville site. Sampson lived intermittently in the Forestville area of Prince George's County and in the District.

Milford's body was discovered by an employe of the Washington Suburban Sanitary Commission off Batson Drive near the Patuxent River Feb. 26. He was last seen alive at a party in his Lockwood Drive apartment early on the morning of Feb. 21, said police.

Milford apparently died from a shotgun wound inflicted at the site where his body was found, Caswell said. Police are offering a $1,000 reward, through the Crime Solvers program, for information that leads to the arrest and indictment of the slayer of Milford.