During Fifield's attack of the hangar bay he is the second crew member killed by him.
When the horribly mutated Fifield kills another mechanic, all that Wallace can do is watch in horror. Suddenly, Fifield pulls Wallace and throws him down. The monster then jumps on top of Wallace and crushes his chest, disabling and wounding him. Wallace is finally killed when Fifield smashes his skull against the floor with his bare hands.