On December 26, 2000, 42-year-old Michael McDermott entered Edgewater Technology in Wakefield, Massachusetts murdering seven co-workers. The day before, on Christmas, he had stashed the weapons used in the shooting in his work locker. The primary weapon was an AK-47 semiautomatic rifle along with a 12-gauge shotgun. Most of the victims were shot 5-6 times with both guns in the head and torso. He also carried a .32-caliber pistol that wasn’t used on anyone, and police found a bolt-action rifle in his work locker, as well as more ammunition. 

During his trial, McDermott claimed he traveled back in time killing Hitler and six Nazis at his workplace, but prosecutors said the attack was motivated by his wages being garnished by his employer for money he owed the IRS. They also found searches on his computer about how to fake a mental illness. Ultimately, his crazy facade didn’t hold up, and he was sentenced to seven consecutive life sentences for each victim without the possibility of parole.