in 1989, dna testing was done and proved that in dna testing at the time three of the five probes matched hart's dna making the chance hart was the killer 1 in 7,700. in 2008, authorities conducted new dna testing on stains found on a pillowcase, the results of which proved inconclusive because the samples were "too deteriorated to obtain a dna profile". in 2017, $30,000 in donations were raised by the sheriff in order to do new dna tests using the latest advances in testing.