MINNEAPOLIS (AP) — Attorneys are seeking a new trial for a man convicted of killing three American Indian women in Minneapolis in the 1980s.

Lawyers for 70-year-old Billy Glaze asked Tuesday that his conviction be thrown out in light of newly discovered DNA evidence.

Glaze is serving three life sentences for the murders of Kathleen Bullman, Angeline Whitebird Sweet and Angela Green.

Glaze wrote from prison to the Innocence Project, a group that uses DNA analysis to re-open criminal cases.

Glaze's attorneys say tests show there is no trace of DNA belonging to Glaze at any of the crime scenes.

David Brown of the Hennepin County Attorney's office says the evidence against Glaze was "very strong," but the office will review the new claims and respond.