The wife said she saw her husband take two syringes from his bag and "attempt to use them on her, but she was able to get them away from him," the documents said.

The doctor accused of attempting to kill his wife while hiking in Hawaii pleaded not guilty on Monday to a second-degree murder charge and insisted he should be allowed to post bail due to his previously clean criminal record.

Prosecutors say an anesthesiologist from Maui tried to push his wife off a cliff during a hike on Oahu, then pulled out a syringe filled with an unknown substance when she resisted.