ANOKA, Minn. (AP) - Authorities say an Anoka man whose body was found in a rented RV in May died of hypothermia.

The Olmsted County medical examiner's office made that finding in the death of 22-year-old Kevin Casserly. But Anoka County sheriff's Cmdr. Paul Sommer says the manner of Casserly's death is still undetermined.

Sommer tells reporters the investigation continues and the possibility of Casserly's death being a homicide has not been ruled out.

A group of men traveling to the Kentucky Derby for a bachelor party found Casserly's body in the RV's outside storage compartment in Winona on May 1.

Casserly's family reported last speaking with him Nov. 11, 2013. His mother found his apartment door ajar with his wallet and cellphone still inside the next day.