Eden Prairie police say Mandy Matula's blood was on a jacket found in David Roe's SUV.
Matula has been missing for nearly a week and was last seen with Roe, who shot himself last week just before a police interview and later died.
Police said Tuesday that tests of blood found on a jacket in Roe's vehicle matched Matula's DNA.
Authorities also said ballistics tests on a round of unfired ammunition found near an Eden Prairie church show it was once in the gun that Roe used to kill himself. KSTP says police took several calls reporting gunshots near Victory Lutheran Church.
Roe had purchased his gun the week before Matula disappeared.
KSTP also reports that police say they have no evidence indicating Matula is alive and they believe Roe acted alone.
The search for Matula continues on several fronts. Volunteers gathered again in Eden Prairie Tuesday. Based on the towers that were serving Roe's cell phone, police have also searched areas in Stearns and Carver counties. They've also searched in Maple Grove, where Roe stopped at a gas station at 4 a.m. last Thursday, about two hours after Roe and Matula were last seen at Miller Park in Eden Prairie.