Dad is identified as DOUGLAS POTTER.
http://www.ksdk.com/story/news/local/2014/03/12/babler-state-park-murder-suicide-douglas-potter-joseph-potter/6321415/
Murder-suicide ruled in father, son found in Babler State Park
Aja J Williams, KSDK 2:32 p.m. EDT March 12, 2014
WILDWOOD, Mo. (KSDK) – Police are investigating a murder-suicide in relation to the father and son found dead in Babler State Park Tuesday.
Douglas Potter, 57, killed his son, Joseph Potter, 20, and then took his own life, according to St. Louis County Police. Police have retrieved a weapon.
A couple found the men's bodies near a hiking trail around 5:30 p.m. Tuesday. Authorities evacuated the park, except a group of students from Crestview Middle School who were there for a camping trip.
No motive has been identified, and no further information was immediately available.