Jurors heard from prosecution and defense attorneys — and then from the dying woman herself — at the start of a homicide trial for a University of Pittsburgh researcher charged with poisoning his wife.

The prosecution says 41-year-old Dr. Autumn Klein can be heard "gasping and groaning and moaning and dying" on the 911 call by her husband, Dr. Robert Ferrante.

Attorneys for the 66-year-old researcher contend that Ferrante did not poison his wife, a neurologist. He also says medical experts will show she wasn't poisoned by anyone and died of unexplained causes.

The jury heard the frantic — and at times ghastly — 911 call from the first witness, an emergency dispatcher.

Prosecutors want a first-degree murder conviction, punishable by life in prison.