Zach was in a relationship with a girl named Gabriella. When he was deployed to Afghanistan, she cheated on him with Vincent. Unknown to him, Vincent had also joined the army and was part of his unit. Both of them signed up for Muirfield and became Beasts and they both survived after Muirfield tried to kill their unit. At some time, he received a letter from Gabriella telling him of the affair; as a result, he killed Gabriella in revenge.