angelika? >> reporter: a rescue boat quickly plucks angelika from the river.t condition was she in? >> she was obviously cold, wet, uh, frantic. >> reporter: but vince had simply disappeared on that dark april night. allowed by the riv. >> it changes your whole world. of course, you hope he made it to shore or he was unconscious somewhere. >> reporter: whatever happened to vince, police quickly begin to suspect it may not have been an accident. when we come back, angelika volunteers to help police out with their investigation, and finds herself in an awkward position. astonishing admissions caught on tape. she says she can explain what she said in jail, what she says now. >> did you really want him dead? >> no. >> reporter: stay with us. re's . i like diet coke. it's super good. and now they have new flavors, like feisty cherry . . . oh yeah, i'm totally into this. just like how i'm into getting a haircut and then waiting for people to ask, 'did you get a haircut?' oh, maybe you're into friends who leave voicemails? i know i am. look, whatever you're into, you