kathy siegrist would tell investigators about a.b.'s suspected affairs during his first marriage to jewel, and detective wagner says there was proof a.bseling women who were very vulnerable for many different reasons. maybe troubled marriage, alcohol abuse, something of that nature. and he would basically counsel his way right into their bedrooms. >> reporter: investigator wendy serfass says she could see the trail of women extending back for decades. >> there's never a period in this man's life where he's not got some woman on the hook. we look back, you know, into the '70s and into the '80s. and it's a constant. you know, you can see the pattern repeating itself over and over again. >> reporter: but even if the pastor was a chronic philanderer as investigators thought, why was that a reason for killing his wives? it seemed to them he'd been cheating on them for years. why resort to murder? investigators speculated something must have changed. whatever it was, there was a sense betty was a troubled woman just before the car accident. >> a month or two before her death there was a noticeable lack of outgoingness with the church that t