WASHINGTON — Walter R. Walsh, who captured gangsters as an FBI agent in the 1930s and went on to train Marine Corps snipers and become the longest-lived Olympian, has died.

Walsh died Tuesday at his home in Arlington, Virginia, his son Gerald Walsh confirmed Friday. Walsh, who would have turned 107 on Sunday, had suffered a minor heart attack a few weeks ago and his health deteriorated, his son said.

Walsh began his FBI career in 1934. On one day in 1935, he helped capture gangster Arthur “Doc” Barker in Chicago and fatally shot gangster, Russell “Rusty” Gibson.

In 2013, at the age of 105 and 321 days, he set a record for longest-lived Olympian, eclipsing a record set by gymnast Rudolph Schrader. He was also the FBI’s oldest retired agent.