NEW HAVEN, Conn. -- A Canadian man accused of abducting his toddler son in 1987 and disappearing for 31 years before being arrested in Connecticut last month has pleaded not guilty to U.S. charges.

Allan Mann Jr. made a brief appearance Monday in federal court in New Haven.

A grand jury recently indicted him on charges he made false statements about his identity in obtaining federally funded housing and Medicaid services. He also faces an abduction charge in Toronto, where authorities say he kidnapped his 21-month-old son during a court-ordered visit in 1987.

Police say they found Mann living in Vernon last month under the name Hailee DeSouza.

Mann's son, now 33, has been reunited with his mother. He believed she had died years ago.

Mann is being detained without bail.