Flaherty was a member of Staff Sergeant Michael Daly's squad. On October 23rd, the squad was enroute to West Stockbridge. Near Concord, the Vertibird carrying the squad was hit by the EMP, known as the Great Blackout, from the nuclear blasts that struck the Greater Boston area and crashed into the roof of the Museum of Freedom. The co-pilot died on impact, while the pilot died from his injuries a day later. The following day Flaherty and another member of the squad was shot and killed by panicked survivors as society collapsed into chaos.
Flaherty is only mentioned in Fallout 4.
This article is too short to provide more than rudimentary information about the subject. You can help Nukapedia by expanding it.