The last contact with Heitman was by a social worker on April 19, 2016. The social worker conducted a home visit in early June, 2016, and found the home empty.
In October of 2016 a duffle bag of clothing, along with identifying documents, belonging to Heitman were found by a hunter n the Mark Twain National Forest in Pulaski County, Missouri. The bag was found about two miles into the forest from the roadway. Pulaski County is about 100 miles south of Columbia, Missouri. A ground search was conducted by local authorities, but no other signs of Heitman were found. (Information retrieved from NamUs.gov)