A mistrial was declared Friday in the assault trial of former King County sheriff's Deputy Paul Schene after a lone juror held out for acquittal.

Schene was accused of assaulting a teenage girl in a holding cell in the rear of SeaTac City Hall.

The 12-member jury voted 11-1 to convict Schene of the fourth-degree assault charge. The jurors began deliberating on Wednesday.

King County Superior Court Judge Michael J. Fox declared the mistrial Friday afternoon.

Prosecutors immediately said they would retry Schene.

Schene, 32, was accused of assaulting SeaTac resident Malika Calhoun, then 15, after she flipped one of her shoes at him.

A widespread video apparently showed Schene kicking her, grabbing her hair, shoving her into a wall and punching her while she lay on the ground.

Calhoun was being booked after being suspected of stealing her guardian's car.