sheriff ron bruce, down from colorado, stood a few feet away. >> he looked at us almost in shock.said, "i can't believe you people are taking this serious." >> reporter: how was that for you to finally make that arrest? >> it felt great. it felt great. and at that point i said, "leslie, we're going to make this right." >> reporter: alex was in school when he was suddenly pulled out of class. >> you know, there are some texas rangers here to talk to me. and i kind of asked, you know, "what's going on? why are you really here?" "your father's been arrested." >> reporter: did you say anything back to them when they told you? >> i was like why? and they said oh, well, we can't tell you that. we just have some great proof. and i said, well, it took you four years. what exactly are you doing? they said we just can't tell you that. >> did you ever think for one second, well there, must be something, he must have done something for -- >> no. >> -- him to be arrested, to be going through this? >> we never doubted his story. we never doubted. we never thought he would have done anything wro