Authorities say a Spearfish man whose body was found in the Black Hills in April died of a methamphetamine overdose.
Twenty-six-year-old Robert Keith Johnson went missing in March. His body was discovered a month later in a wooded area on Lookout Mountain.
Hikers found some of Johnson's belongings on the mountain in March, but a spring storm hampered initial search efforts.
An autopsy report lists meth toxicity as the cause of death.