Hours after announcing two arrests in the death of 79-year-old Lila Warwick, the Kandiyohi County Sheriff's Office confirmed a third teenager was arrested on Thursday.
Police arrested a 17-year-old boy at about 1:15 p.m. in connection with the homicide investigation, but few other details were released.
With a total of three suspects now in custody, investigators are still declining to comment on a possible motive; however, they do not believe the crime was a random act.
Two teenagers, ages 19 and 16, were arrested late Wednesday night in Willmar, Minn., and Kandiyohi County Sheriff Dan Hartog said Warwick knew both of them. It remains unclear whether the third also knew her.
Warwick, who lived alone, was found dead Monday when deputies were called to her home off Highway 12 to perform a welfare check after she failed to arrive at her church to volunteer.
The preliminary autopsy results show Warwick suffered multiple stab wounds and neck injuries consistent with strangulation.
Officials booked the first two teens who were arrested on charges of second-degree murder and first-degree burglary. It is unknown what charges the third suspect may face.
The 19-year-old suspect, Brok Junkermeier, has a criminal record that includes multiple theft charges. He was arrested from his job in the mail room of the West Central Tribune while the 16-year-old was arrested at his home. Officials did not immediately specify where the third teen was arrested.