Pennsylvania, New Jersey, and Connecticut law enforcement are hunting a double murder suspect.<br />According to Newser, University of Connecticut senior Peter Manfredonia is believed to be armed and dangerous.<br />Police say the 23-year-old killed a man with a sword or machete in Willington, Connecticut, on Sunday.<br />He also allegedly stole several guns during a home invasion in Willington before killing acquaintance Nicholas Eisele in Derby, Connecticut.<br />He also kidnapped the man's girlfriend.<br />Police found Eisele's abandoned vehicle in New Jersey Sunday afternoon, along with the abducted woman. She identified Manfredonia as her captor.