Kayak Murder Case: Interrogation Video May Have Key Role

Angelika Graswald is accused of killing her fiance during a kayaking trip on New York's Hudson River.
4:19 | 09/14/15

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Transcript for Kayak Murder Case: Interrogation Video May Have Key Role
We begin with the New York woman accused of killing her fiance while kayaking on the Hudson river. The newly released interrogation tape says she wanted him dead. Her lawyer says that is not a confession. Reporter: They call it the mighty Hudson for its strong currents and rough water ps that is what Angelika graswald says her fiance's kayak capsized. Just a tragic accident. This morning, the interrogation tapes revealing what she told police in the days after he wept missing. This morning, ABC news obtaining this footage of Angelika graswald being questioned by investigators. The 35-year-old denying she intentionally removed a plug from 46-year-old Vincent viafore's kayak so he would drown. You wanted him to be dead. You wanted to be free. Reporter: Earlier, graswald making this desperate call from her kayak to 911. He's had a little, like a floating thing. He didn't have a vest. It wasn't a vest but he had something to hold? Reporter: Prosecutors say it was an act. Claiming the woman who posted these images on Facebook while her fiance was still missing stood to gain $250,000 in life insurance benefits. Graswald has pleaded not guilty. Her attorney says she never admitted to killing viafore. She denies killing him. It's sport to distinguish between what they're saying is a confession and an interrogation. Reporter: Kayakers say removing that plug would not cause to it capsize. Police say viafore was not wearing a life vest. Graswald is charged with second-degree murder. She's being held on $3 million cash bail. That's a $9 million bond. Thank you, Linzie. We're going the talk to Dan Abrams. In your legal opinion, was that a confession? No. A confession would be, I killed him. Here's how I did it. Here's why I did it. She said, you want a confession, okay. You want a statement, she says, okay? You want a statement? She seems exasperated. She's been in there many, many hours. She says, I wanted him dead, now he's gone. I'm fine with it. Is that an incriminating statement? Absolutely. Is that helpful to her case? Absolutely not. But it's not a confession. This is a reminder as to why lawyers tell their clooints, don't talk to the police unless I'm there. This is the textbook example of that. What are we hearing from the medical examiner from the autopsy? The medical examiner here has gone well beyond what we hear. They usually look at the body and say, this is the cause of death. This medical examiner has term, according to "The New York times" that the removal of the plug is the cause of death. What do we have, "Quincy M.D.?" Considering what the kayaking experts are saying about how difficult that would be as a method to kill someone, it's an odd result. This is not an easy case for prosecutors. Thank you, Dan. We get the hunt now for the

This transcript has been automatically generated and may not be 100% accurate.

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