OSAGE, Iowa (AP) — A man has pleaded not guilty to supplying alcohol to a woman who authorities say was driving drunk when her vehicle hit a tree in northern Iowa, killing her.

Mitchell County District Court records say the plea was entered last month for 22-year-old Justin Slaichert, of St. Ansgar. His arraignment hearing is scheduled for April 24. The charge: supply alcohol to an underage person, resulting in the person's death.

Authorities say Slaichert's girlfriend, 19-year-old Hanna Pfeifer, died when her vehicle rammed a tree Jan. 6 in St. Ansgar. Tests showed her blood alcohol level was nearly twice the legal limit.

Court documents say Slaichert told officers he'd bought three beers for Pfeifer.