The doctor who is accused of trying to kill his wife on a Hawaii hiking trail pleaded not guilty on Monday during a court appearance via video conference. Gerhardt Konig's not guilty plea is "a substantive response to the allegation that he tried to kill his wife," his attorney, Thomas Otake, said in a statement.

A restraining order has been granted against Gerhardt Konig, the former UPMC doctor accused of trying to kill his wife in Hawaii. The order forbids Gerhardt, who is currently being held on $5 million bail,

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.