Brad abandoned his teammates once he witnesses the death of Joseph Frost in the woods of Arklay Forest. He tries to contact the player while flying around the Arklay mountains. In the final battle with the Tyrant, he defies his nickname by showing up to toss you a rocket launcher that is needed to kill the Tyrant. In both the original Resident Evil and its remake, Brad is never actually seen in person and is only heard while he's piloting the helicopter.
Brad plays no part in the main storyline, but does make a special cameo appearance as a hidden zombie. No explanation was given as to how he met his end, but it is eventually revealed that he reawakened from the t-virus infection he suffered from the Nemesis in Resident Evil 3 (see below).
He is found wandering around the R.P.D. headquarters if the player makes it there, from the beginning in the Raccoon City streets, without picking up any items. Brad has more stamina than a regular zombie, however, but killing him rewards players with a special key. The key can then be used to open the wardrobe locker in the Police Department and lets players change Leon and Claire's outfits.
Brad discovers off-screen that the S.T.A.R.S. members were being targeted by a powerful abomination known as the Nemesis, Umbrella's newest Bio-Organic Weapon. He warns Jill Valentine about the creature's presence in Raccoon City before being killed by it at the front gate of the Raccoon City Police Department before her eyes. This leads to his resurrection as a zombie, and the corpse is gone when Jill next leaves the police station.
When first encountered, Brad will respond to Jill differently--either relatively more friendly or hostile--depending on whether the player chose to help him fend off a zombie or not.
Brad is also featured in RE3's minigame, Mercenaries: Operation Mad Jackal. He is one of the ''hostages'' that the player can save, located in the restaurant basement.
In the N64 version, there's an exclusive document in which Brad describes his encounters with Nemesis. It reads as follows:
No!! It's that monster in the black suit again! Why does that thing keep chasing me?! What did I do? This must be someone's sick idea of a joke. If I knew things were going to end up like this, I would have left the S.T.A.R.S.team a long time ago. But whining won't help me now. I know I'm finished...
Oh... In my hometown Delucia, I bet the flowers are in bloom. If I could only see them once more before I die...