UPDATE: North Iowa teen arraigned on murder charge - KTTC Rochester, Austin, Mason City News, Weather and Sports

MASON CITY, Iowa (KTTC) -- A north Iowa teen has been arraigned on charges he assaulted and killed his mother.

Noah Crooks, 14, of Osage, appeared in Cerro Gordo County Court.

Crooks is charged with first-degree murder and first-degree assault with the intent to commit sexual abuse.

Noah's mother, Gretchen Crooks, was found shot-to-death at their home back in March.

Two weeks ago, it was ruled that Noah would be waived to district court as a youthful offender.

The move makes it possible to keep him, if convicted, in the court system past the age of 18.

Noah's attorneys have filed their intention to mount an insanity defense.

Tuesday in court, this motion went uncontested by the prosecution.

"Thirteen years of age alleged to have committed this act; obviously something's wrong and the thing that I think that should be very noticeable is that his father, who loved his wife, his father was here in court today supporting his son," said Defense Attorney Bill Kutmus.

In court, Crooks waived his right to a speedy trial in order to allow the defense more preparation time.

Kutmus says the defense will most likely seek a change of venue in the coming months due to extensive media coverage since March.