ridgway, i want you to look me in the face. >> families of gary ridgway's victims would get to confront him, but they would have to wait. while police conducted a videotaped interrogation that laid bare the mind of a monster. >> i killed her because i wanted to. >> why did you come here in the first place? >> the hate, wanting to get even with them. >> why? >> because she's a prostitute. nobody would look for her. >> why did you hate them so much? >> why did i hate them? because women had control of me and i don't like being controlled. i had control when i killed the women. i got my rage out for the time. >> could we walk down near that tree? it looks familiar. >> a team of detectives and psychologists, led my tom jenson, who had stayed on the case all those years, began their intense interrogation of gary ridgway in june of 2003. fittingly, on friday the 13th. even though under the terms of his plea agreement he was obligated to tell the truth, getting the truth from a killer who had lied for 20 years wasn't easy. >> he's not only a psychopath, but he's a pathological liar. so in the

his sister married ridgway's older brother. he hung out with ridgway's younger brother. he says on the surface, the ridgways seemed like a normal, jcpenneys. love in that family. it was very strict and structured and any disobedience resulted in, seemed to me, very out, girls were afraid of him. they wouldn't date him because of that. he had a reputation. felt uncomfortable around rk knew he had been questioned about the green river murders in that was the first thing people pointed out to me was gary he told his co-workers it was up, he wasn't down there actually trying to get prostitutes, he was trying to preach to them and help them stop being a prostitute. >> all this information about his life was useful, but it was but it was just another battle in dave reichert's 20-year personal crusade. >> i am passionate about it and i do have a personal relationship with the victims. >> families and friends of the dead women were looking forward to the trial of gary ridgway. hoping for answers to questions that had haunted them for 20 years. >> i want to know a reason why. i w

. >> reporter: soldier jeremiah ridgway can shoot but not just with his gun. his images captured at the front lines of war branded in a national geographic documentary. >> i told the story not only for myself but everybody they serve with at that time. >> reporter: that time was 2006. jeremiah was 23 and he spent a year and a half in the dusty arid mountains of afghanistan. the army veteran served as a 19 delta cavalry scout riding humvees, not horses. >> it smells the same, though. >> reporter: but when he came home to college life -- >> i definitely never had to groom a horse. >> reporter: it wasn't the same place because he wasn't the same person. >> just, as they say, baptized by fire. and then as through the deployment, it just got worse. it became more dangerous and a lot of people were hurt, injured, and killed. just keep going. i'll follow you. >> oh my god, this is so amazing like how you can control this. >> reporter: here at gilroy's california stables, jeremiah found something he didn't know that he was looking for. >> here, you're not the only one