NBC's 'Dateline' has been following the story of Kauai family Sandra Galas, who was found strangled to death in her garage on January 25, 2006. She and her husband Darren had two young sons, Austin and Brayden. When they separated, Darren began seeing another woman, and the pair fought bitterly over custody of their kids. However, they eventually came to a divorce agreement whereby they shared joint custody of their boys.
The morning of Sandra's murder, her sons were at Darren's house waiting to be picked up. He told investigators that she was supposed to show up but didn't. Several things about Darren's story didn't add up, but due to the lack of evidence, his home was not searched and he remained free on bail.
In 2012, new forensic technologies finally allowed investigators to pin Darren down as the killer. The key piece of evidence was a diary he kept, where he meticulously recorded every time Sandra upset him or made him angry, including her failure to pick up the boys on the day she died. However, this alone wasn't enough to charge him so police set about building their case.
In 2018, twelve years after his wife's death, Darren Galas was sentenced to a minimum of 10 years in prison for the assault in the first degree that caused the murder of Sandra Mendonca Galas. He was convicted in January and his sons were present in court to support him.