York police say 50-year-old Francis Plaza is heard in the background of the 911 call as his 18-year-old son was summoning help.
Authorities say Plaza can be heard saying, "Just let her die, boy. Let her die."
Plaza is charged in the July 25 slaying of Michelle Plaza. He has admitted killing his wife but maintains it was not premeditated.
He is due in court for an arraignment on Sept. 25.
Information from: The York Dispatch, http://www.yorkdispatch.com
