During their infiltration into Birkin's laboratory, a member of the team opened fire on Birkin, leaving him gravely wounded as they took the briefcase containing the both viruses. Birkin, however, was holding a sample of the G-Virus as the event occurred, injecting himself with it.
The mutated Birkin then ran after the team, decimating its ranks. HUNK, however, managed to survive, and reach the roof of the Raccoon City Police Department for the evacuation helicopter.
Until Resident Evil Outbreak File #2, HUNK was thought to be the only Alpha Team survivor. But with it was revealed on a unused Outbreak character list that Miguel somehow survived the initial attack with a head injury, but was later killed by anyway.