There are at least 4 artists that go by this name, one from Staten Island NY, a Melodic Hardcore Band that were called SLEEPER before but had to change their name for some majorlabel scum.
One fronted by Wiz post Mega City Four/pre-Ipanema: (www.myspace.com/megacityfour and www.miseryandvomit.com)
One from Edinburgh, Scotland
http://myspace.com/serpicoband)
and the other from Pori, Finland (http://www.serpicoband.net)