i don't know if that means anything or not. >> reporter: sheriff's deputies spent a lot of their investigation looking at the relationships in becky's life. first her son michael. then david. but it was becky's relationship to her other son chris that would prove to be the most intriguing. >> it was a real, real strange mother/son relationship. when his mother called, he would drop everything and go to mom. whatever she wanted, he was there. >> reporter: becky, investigators discovered, doted on chris and showered him with extravagant gifts -- money, a motorcycle, a car. nothing was too expensive for chris. not even the house he lived in. >> it was a house purchased by his mother. >> eighteen year old kid with his own house? >> correct. that's kinda strange, you know. >> was he a mama's boy? >> well, i mean, i guess he was a mama's boy, you know. anything he needed, he got. >> reporter: but according to michael, becky's over-the-top generosity always seemed to come with strings attached. >> it was that, "hey, i'm gonna need something from you. here's the keys to your new car." "hey, i'm gonna need something from you. here's your house." "hey, i'm gonna need something from you. here's an envelope full of money." >> reporter: and whatever becky asked for, chris would eagerly deliver. >> he said, "it may be very hard for you to understand, but i would do anything in this world for my -- for our mother." >> reporter: could "anything" have included killing his mother's romantic rival? michelle amerson, who knew the family well, says over the last several years chris had grown distant. she worried he was heading down a dark path. >> he had changed a lot. so we were -- we weren't around him a lot. >> when you say, "he changed a lot," michelle, what are you thinkin' about? >> i hate to say, but you know, he just appeared to be in a different type of crowd than we were hangin' with. with strings attached. >> it was that, "hey, i'm going to need something from you. here's the keys to your new car." "hey, i'm going to need something from you.