GRAND ISLAND, Neb. (AP) — Grand Island police are investigating the death of 33-year-old man earlier this month, saying a preliminary autopsy has shown the man was asphyxiated in bed.

Eric Lathrop died early Dec. 7 staying at the home of a friend in Grand Island.

Police say the man’s death is suspicious. Investigators are awaiting final autopsy results, which may not be available for several weeks.