from here to go straight across, you can see bannerman's island and the castle right there across. todd wright. a professional guide and outdoor instructor, he's recognized as one of the top kayak safety experts in the world. working with us as a consultant, he's in the same make and model kayak as the one vince owned. >> when you're out on the water, you definitely feel the current and the wind. we ask him about angelika's claim that the wind and the current separated her in her kayak from vince in the water. and when she says that she's being blown away from him and that he's being pulled in a different direction? >> yes, that can happen. if he's in the water, he most likely would be going with the current and whereas the kayaks will go with the wind. >> reporter: we also know the water temperature that day was 48 degrees. >> correct. >> reporter: how quickly after falling into water that cold do you become incapacitated? >> there's that initial cold response and there's panic, your heart rate increases -- >> reporter: you're basically hyperventilating. >> yeah, you're hyperventilating. grab

. >> reporter: so we went to the hudden with todd wright, a top kayak safety expert.the infamous plug. >> it is. >> that prosecutors say angelique cathedral removed in a plot to kill vince. but this plug is, what, half an inch in diameter. >> look at how large the cockpit is where the seat is. there's a lot of water that can enter that. that's a big hole. >> reporter: that plug is tiny and our experiments showed that this kayaker had no trouble crossing the hudson in an identical kayak with the plug removed. did you kill vince? >> no. >> that day? well, prosecutors will have to prove their case. there is a gag order right now under way for both the defense and the prosecution so they can't answer a lot of these questions which is all the things that you would have to take into account in order to make that murder happen. i mean she's charged with premeditated murder as well as manslaughter so have both ways to go. why would she say the things she said, you were asking. it's important to note she was in there for 11 hours. it's a small room with no windows. she wasn't