(Capcom's primary storyline)
"Don't hurt him... Don't hurt him... "
— A. Kirkpatrick as he watches a USS team member get slaughtered by a Mutated Birkin.
A. Kirkpatrick was an operator within the Umbrella Security Service and took part in OPERATION: NESTWRECKER. He was a member of the Alpha Team under the command of HUNK, who were sent to retrieve the G-Virus from Dr William Birkin in the NEST facility.
At 23:45 on 22 September 1998, A. Kirkpatrick and Alpha Team infiltrated Dr Birkin's lab. A standoff quickly occurred which was soon ended after J. Martinez gunned down Birkin after he pulled out a sidearm. Kirkpatrick went to check the pulse of Birkin, only to sigh in annoyance, believing he was dead. He was then ordered by HUNK to pick up the samples and move out.
Not too long afterwards, Mutated Birkin began to attack the U.S.S. soldiers in NEST. Kirkpatrick along with HUNK and two other U.S.S. operators were able to escape NEST into the sewers to attempt to reach their extraction point. However they were confronted by the Mutated Birkin, who began to kill them. Kirkpatrick was carrying the case when he was fatally wounded by Birkin and knocked to the ground, then to watch his last teammate be killed. During this, Kirkpatrick had seemed to attempt to close the sample case to stop Birkin from ingesting anymore G-samples but failed.
He soon succumbed to his injuries in the time between his helmet was removed, being his body found by survivors a week later, however, due to the leak of the t-Virus inside the NEST, Kirkpatrick had been infected and as such, his body did not actually die and remained zombified in an unconscious state.
- He is most likely the operator who picks up the samples after the confrontation with Birkin, as in a later tape he his seen fatally wounded next to them.
- If he is sufficiently agitated (I.E. by attacking his corpse or by one of the Zombies nearby tripping over him), he animates as a Zombie and attacks the player.