I was watching a lot of L&O:CI fairly recently, like a year or two ago. It may not have started happening right away, but maybe by season 3 or so it seemed like Goren was doing this like every single episode. He didn’t trick the suspect like Colombo would, by getting the suspect to accidentally reveal info that only the killer would know; instead, when Goren knew the suspect did it but didn’t have the evidence to get a conviction, he would browbeat and psychologically manipulate them into confessing. He’d basically bully confessions out of them.