Jake Embert was fatally shot in his Georgia home more than a decade ago. His family searched for justice for years, enduring a legal saga that spanned three criminal trials and what they said was an agonizing series of failures and mistakes at nearly every level of the justice system in Dougherty County, in the southwest part of the state. “A slow, grinding, merciless erosion of our humanity” is how his daughter, Rachel Embert, once described it. For more on the case, tune in to “Malice” on “Dateline” at 9 ET/8 CT tonight. In January, that process took a big step forward. For the second time, Jake’s second wife, Susan Embert, 61, was convicted of murder in a crime prosecutors described as a financially motivated killing staged as a suicide. Embert was sentenced to life in prison without the possibility of parole. She has always maintained her innocence and told “Dateline” that she had nothing to do with her husband’s death. For Rachel, the long-awaited resolution felt like justice.…