. >> reporter: jeff schaack -- in charge at a nearby yacht club -- helped coordinate rescue efforts. >> it was april and it was cold out. >> i need him to be rescued. >> where did you guys go into the river? >> the boat is coming towards me right now. >> reporter: angelika's 911 call ends abruptly. somehow at that moment she too capsized and went into the deadly cold water. >> where did you guys go in at? angelika? >> reporter: a rescue boat quickly plucks angelika from the river. what condition was she in? >> she was obviously cold, wet, frantic. >> reporter: but vince had simply disappeared on that dark april night. swallowed by the river he loved. >> 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. the things she says, that moment caught on tape, that could damn her in the eyes of the law. stay with u