Andrew "Andy" Trudeau was an inspector for the San Francisco Police Department and the partner of Darryl Morris. He was a childhood friend of the Halliwell sisters, as he grew up in close proximity to them, and had an on again-off again romantic relationship with Prue since high school.
As an adult, Andy became an inspector like his father and grandfather before him.[1] After the sisters gained their powers, Andy grew suspicious of them since they were connected to several unsolved cases involving magic. He later quit after being investigated by Internal Affairs, which was actually set in motion by the demonic Inspector Rodriguez.
Andy later learned the truth about Prue and her sisters. Seeking to protect them from Rodriguez, he was struck by an energy ball thrown by Rodriquez and was tragically killed.