Arlington police are investigating a death from Saturday they call “suspicious.”

Shortly after 10 a.m., according to county police spokesman Dustin Sternbeck, a family member found Mack Wood, 87, dead in his home in the 3700 block of North Wakefield Street.

Sternbeck said homicide detectives are investigating the case while they wait for results of an autopsy. “We can’t say for certain whether he died of natural causes,” Sternbeck said.

Family members described Wood as a “vibrant 87-year-old,” according to Sternbeck.