Former Webb City principal waives arraignment on double murder, bound over for trial

Former Webb City High School Principal Mark Porter waived arraignment today in Greene County Circuit Court and was bound over for trial on a first degree murder charge.

Porter is charged with killing Gary and Jan Tyrell of Springfield. Mr. Tyrell was the assistant superintendent of the Mountain Grove school district when Porter was superintendent.

The probable cause affidavit indicates that DNA and the tracking of stolen coins led authorities to Porter.
Porter's next hearing is scheduled for Friday, October 31.