The soldier who died after going missing during land navigation training at Camp Blanding, Florida, died from heat exposure, officials have ruled.

Spc. Calyn McLemore went missing June 20. He was found dead two days later in a wooded area of the installation.

The Duval County medical examiner has since ruled that McLemore died from environmental heat exposure, the Florida Times-Union reported Tuesday.

McLemore was a member of the Army Reserve from Alabama who was attending the Basic Leader Course at Camp Blanding’s 211th Regiment Regional Training Institute, according to a statement released at the time by the Florida National Guard.

About 450 people, including all permanent-party personnel at Camp Blanding and personnel from a number of local, state and federal agencies, launched a widespread search for McLemore after he disappeared, officials said.

Prior to finding his body, searchers found some of his discarded equipment, including a navigational instrument that helped the searchers to focus their efforts on a 1,000-acre portion of land on the 70,000-acre installation.

McLemore’s body was found in that area on June 22.

According to the medical examiner’s report, the soldier’s death was declared an accident and not a result of any foul play, the Florida Times-Union reported.