The following is a possible concise summary:
The text is a transcript of a video that discusses three cases of cops who tried to get away with murder. The first case is about William Talley, who shot his girlfriend Kelly Levinson and then crashed her truck. He was arrested and sentenced to life in prison. The second case is about Matthew Boynton, who was suspected of assaulting his wife Jessica Boynton and staging it as a suicide attempt. He was caught lying under oath and resigned from the force, but was never charged for the assault. The third case is about Stephanie Lazarus, who killed her ex-boyfriend's wife Sherry Rasmussen in 1986 and hid the crime for 23 years. She was eventually convicted of first-degree murder after DNA evidence linked her to the scene.
Here are some key facts extracted from the text:
1. William Talley, a former police sergeant, shot and killed his girlfriend Kelly Levinson in 2019 and was sentenced to life in prison.
2. Matthew Boynton, a police officer, was suspected of assaulting his wife Jessica Boynton in 2016, but was never charged due to possible police corruption.
3. Stephanie Lazarus, a detective, murdered Sherry Rasmussen, the wife of her ex-boyfriend John Rutton, in 1986 and was convicted in 2012 after DNA evidence linked her to the crime.