*** UPDATE ***
The three suspects in this case are expected to be arraigned today at about 2 this afternoon.
*** END UPDATE ***
Police say they've arrested three suspects in the death of a Michigan State University student who was found unconscious along an expressway.
Police from Clinton County's Bath Township made the arrests.
Nineteen-year-old Dustyn Frolka of Owosso was a sophomore at Michigan State, and he was found lying along Interstate 69 in the township on Feb. 15. The site is near East Lansing.
He was declared dead at Lansing's Sparrow Hospital. Police say they're awaiting toxicology results to determine what killed him.
Authorities say detectives made the arrests in Saline, near Ann Arbor.
Authorities say two adults and a juvenile are being held at the county jail and will be arraigned Monday in St. Johns District Court on open murder charges.