Park brake locked wheel

[BrentHamm]

My son bought a 2001 gtp coupe last week. Tonight he was driving and used the park brake (go figure) and it locked the drive side rear wheel. He was close to home, and ended up backing up all the way home (With a friend driving in front of him).

Anyways, any idea what to do to remedy this? I tried the pedal several times and could not seem to disengage it.

Thanks.