He was born in Darby and, in his 20s, ended up at the University of Wisconsin, where he rowed on the university’s varsity team and wrote about sports for the student newspaper.

Leo F. Burt is also an FBI suspect in the largest act of domestic terrorism committed during the anti-Vietnam era, the bombing of a mathematics research center affiliated with the U.S. Army on campus, writes Liva Albeck-Ripka for The New York Times.

Graduate student Robert Fassnacht, 33, a physics researcher, was killed and five others injured.

Burt has evaded capture since the Aug. 24, 1970 bombing, even as the FBI received hundreds of tips about his whereabouts.

He was spotted in Cleveland weeks after the bombing, at a Denver homeless shelter years after, and at a resort in Costa Rica.

Last week, the FBI released new images of Burt as he might look today, aged to about 75 years old.

He is still wanted for sabotage, destruction of government property, and conspiracy and “should be considered armed and dangerous,” the F.B.I. said.

Authorities say he plotted with three other men to bomb the center, detonating a stolen truck containing fertilizer and fuel oil.

Read more about Leo F. Burt and the bombing in The New York Times.