Barack Obama was sworn in as America's 44th president 1,425 days ago. Since then, five of the 12 deadliest mass shootings in our history have happened. Here they are, as well as other lesser mass gun-killings that happened under his watch.

Suspected murder and former college professor Amy Bishop attempted suicide in jail a day after she was charged with the killing of her brother.

Almost 24 years later, rampaging college professor Amy Bishop has been indicted for shooting her brother in the chest with a shotgun. The killing was originally declared accidental, after Bishop claimed she was trying to unload the shotgun. [Boston Globe]

Failed biology professor/murderer Amy Bishop, who killed her brother in 1986 with a shotgun she was "learning how to use," might not have killed him accidentally—and the Norfolk County district attorney has reopened the case. [Boston Globe]

In addition to being a college professor, alleged University of Alabama Huntsville shooter Amy Bishop was also an amateur novelist. We may have found one of her books and it's a tale of aliens and ammunition.

Amy Bishop, the biology professor who shot six of her colleagues, killing three of them, is a paranoid, angry woman who hates kids and was obsessed with a researcher who ended up in a dead-end job. (She also played D&D.)

Picking up any kind of "waning sign" for random acts of violence is—unless you're living in dystopian futures of mind-readers—nearly impossible. This reality only serves up Amy Bishop's past as even more of a bitter pill to digest.