Katherine Ann Power’s story plays out like a Hollywood movie: the radical anti-war college student participated in a Boston bank heist in 1970, intending to help fund a revolution. The heist went horribly wrong; her co-conspirators were arrested, and Power — the getaway driver — hid from the FBI for more than two decades under a different identity, spending some of that time working and raising a family in Lebanon, Corvallis and Albany. The difference, Power said, is that she is not a movie protagonist, and Boston Police Officer Walter Schroeder, who was shot and killed during the heist, was...