A Fairfax County man was found slain in his apartment Tuesday afternoon, and police said yesterday that they are questioning a man in Florida in connection with the killing.

Richard Gluckstern, 46, was discovered dead at 4:30 p.m. in his apartment in the 12100 block of Elm Forest Way by police who were contacted by the victim's worried mother. At the same time, Florida law enforcement officials had contacted Fairfax police about the discovery of some of Gluckstern's property in the possession of a man they arrested Monday on an outstanding warrant.

Jason E. Lee, 23, was picked up by Marion County sheriff's deputies at the Countryside Motel in Belleview, Fla., for violating his probation, a spokeswoman for the sheriff's department said yesterday. Officials said Lee's probation stemmed from a conviction in 2004 for grand theft and forgery. Lee also was convicted in 2002 on a charge of battery.

Florida sheriff's officials confirmed Lee's connection to the case and said he was being held in the Marion County jail without bond for violating his probation. Meanwhile, Fairfax police detectives were in Marion County meeting with investigators to discuss the case.

"We're not calling him a suspect," said Shelley Broderick, a Fairfax police spokeswoman. "He's a person of interest. Detectives will want to determine how he came to have our victim's item."

Police said yesterday that they still weren't sure when Gluckstern was killed but said the medical examiner has determined that he died of asphyxiation.

Reached by telephone last night at his home in the Bronx, N.Y., Gluckstern's father, Arthur Gluckstern, 85, described his son as a caring, shy man who at times could be naive about people's true intentions.

He said his son had plans to attend the annual spring fair last weekend at the Fairfax County Government Center, a few blocks from his home. Gluckstern said he believes it was there that his son might have been targeted.

Gluckstern said police told him Lee stole "everything my son owns" and was found in Florida with his car, causing investigators to call Fairfax police.

Gluckstern, a computer specialist, lived in the Post Forest apartment homes, garden-style apartments with a gated entry. The motto printed on brochures for would-be renters reads: "Every Day Is a Beautiful Day at Post Apartment Homes."

Building management would not allow reporters into the complex yesterday to interview Gluckstern's neighbors, offering that he had not lived there long enough to know many residents.

Arthur Gluckstern, a disabled veteran who is separated from his wife, said yesterday that he was still struggling to fathom the loss of his child.

Gluckstern said his only other child, Richard's sister, died almost exactly four years ago at age 46 after a battle with cancer.

"Now I have no more," Gluckstern said. "I'm in the last legs of my life. . . . You never dream something like this will happen to you, and it does."

Staff researcher Bobbye Pratt contributed to this report.