MSNBC Dateline August 26, 2019 06:21:00
>> reporter: and especially in light of toni's death, they wished lynn's case had been investigated more thoroughly. the douglas county sheriff's office declined to speak with us. but michael fleeman who has written a book about the henthorn cases says sheriff's detectives did investigate, at least initially. >> everything was progressing as if this was suspicious, and then all of a sudden the brakes were put on the investigation. it was declared an accident and forgotten for nearly 20 years. >> reporter: detective charlie mccormick thinks the reason for that was the coroner's quick ruling tha...