The defense attorney for a woman accused of fatally sabotaging her fiance's kayak on the Hudson River says his client may have miscarried during an interrogation and asked investigators who "Miranda" was hours after she was read her Miranda rights.

Angelika Graswald's attorney, Richard Portale, revealed the details at a pretrial hearing Tuesday on whether Graswald's statements to police can be used during her upcoming murder trial.

The Miranda warning informs suspects they are allowed to say nothing and obtain a lawyer.

State police Investigator Donald DeQuarto says he believes Graswald understood her rights when she admitted to removing the drain plug of Vincent Viafore's kayak in April 2015.

DeQuarto says she also admitted to tampering with his paddle. Viafore drowned after his kayak capsized.

Graswald has pleaded not guilty.