I had a friend back in the day who spent 25 years in jail for killing his father. His mom called him from three provinces away (Canada) and told him she was in hospital because his dad had beaten her so badly. My friend wasn’t exactly a shining member of society at the time and was part of a street gang (1970’s) dealing drugs and getting in brawls. The police in his city knew him by name and he’d spent time inside. He hadn’t spoken to either of his very religious parents for 7-8 years at that point.
Upon hearing this form his mom, he stole a car immediately and drove until it had no fuel then stole another. He did this until he arrived at the farm where he grew up. He walked in the door, grabbed father by the lapel and drug him outside. Mother was still in hospital. He literally beat him to death right there with just his fists at the bottom of the steps of the family house and then phoned the police and turned himself in.
He was one of the genuinely nicest people I have ever met and would go out of his way on the regular to help anyone who needed help. I met him over 25 years ago. He’d be in his mid eighties now.