UPDATE 7/30/13 @ 2:15 p.m.
PITTSBURGH (AP) -- A University of Pittsburgh medical researcher has pleaded not guilty to charges of criminal homicide alleging he poisoned his neurologist wife by lacing an energy drink with cyanide.
Dr. Robert Ferrante pleaded not guilty Tuesday during his arraignment in Pittsburgh a day after he waived extradition from Bluefield, W.Va., where he was arrested last week.
Ferrante, who is being held without bond, will have a preliminary hearing on Aug. 9.
Ferrante's attorney, William Difenderfer, has said his client "adamantly" denies any involvement in the April 20 death of his wife, Dr. Autumn Klein.
Kristen Keller, the prosecuting attorney in Raleigh County, W.Va., says 64-year-old Dr. Robert Ferrante is due in court Monday afternoon.
Ferrante was arrested in West Virginia on Thursday after Pittsburgh police flew to Florida to arrest him, only to learn he had left. Authorities haven't said why Ferrante was in Florida.
His attorney says Ferrante was stopped while he was driving back to Pittsburgh to surrender to a charge that he poisoned 41-year-old Dr. Autumn Klein in April.
Ferrante has denied that through his defense attorney.
Instead, West Virginia State Police stopped 64-year-old Dr. Robert Ferrante on Thursday night.
He's being held at the Southern Regional Jail until he can be extradited to Pennsylvania to face a charge of criminal homicide in the April 20 death of his wife, Dr. Autumn Klein. The extradition process is expected to take a few days.
Allegheny County officials says Ferrante left St. Augustine, Fla., on Thursday after learning Pittsburgh police were coming to arrest him. But defense attorney William Difenderfer says he simply told Ferrante to drive back to Pittsburgh to surrender.
Dr. Robert Ferrante was arrested on the West Virginia Turnpike just north of the Ghent toll booth.
Investigators say they believe he poisoned his wife, Dr. Autumn Klein last April by giving her an energy supplement laced with Cyanide. He is being held at the Southern Regional Jail.