A jury convicted him of murdering his 5-year-old daughter. He was sentenced to spend the rest of his life behind bars. Now, that murder conviction has been overturned. A case where 5-year-old Harmony Montgomery was beaten to death, her body hidden for months, and her remains disposed of so thoroughly that she has never been found. A jury heard the evidence, found Adam Montgomery guilty, and many believed justice had finally been served. But now, in a shocking twist, that conviction has been thrown out. Today, we're revisiting Harmony's story, the trial that captivated the nation, and the bombshell ruling that has once again put this heartbreaking case back in the spotlight…