Kathleen Peterson's death at the bottom of a staircase sparked a murder investigation that revealed shocking secrets about her husband Michael Peterson—his hidden bisexuality, affairs, and a strikingly similar death of his friend Elizabeth Ratliff in 1985. After a sensational trial in 2003, Peterson was convicted and sentenced to life without parole, but a tainted blood spatter expert's testimony led to his 2017 Alford plea release, leaving questions about what really happened unanswered. Michael Peterson's conviction in 2003 relied heavily on blood spatter analysis from SBI expert Dwayne Dever, who was later found to have provided false testimony or misrepresented evidence in at least 34 cases, including Peterson's.