Adam O'Neill was the lawyer for infamous serial killer Kyle Boone as well as being his accomplice and also a copycat killer who had spent the last three years torturing and killing many innocent women while also carving Boone's own personal mark on their backs despite the fact that Boone himself had spent the last ten years in prison on Death Row.
He kidnapped Agent Paula Cassidy and attempted to torture her before killing her which would have made her his fifth victim.
Luckily, though, Cassidy managed to get the upper hand and struck back, resulting in O'Neill's death while Cassidy survived with only some minor flesh wounds and a broken arm.
As a result, Boone's execution presumably went ahead as planned much to the serial killer's outrage.
- Four unnamed female victims- (same M.O as Boone's).
- Agent Paula Cassidy- (attempted but she fought back, killing him).