Police say a missing 16-year-old girl last seen with a sex offender at a Tacoma bowling alley is the daughter of Pierce County sheriff's spokesman Ed Troyer.

Police spokesman Mark Fulghum (FUL'-jum) says Briana Troyer was at Tower Bowling Lanes with members of the Wilson High School bowling team and left about there at 5:30 p.m. Tuesday with 21-year-old Terrence D. Powell, a Level 1 sex offender - the lowest level.

Fulghum issued an Amber Alert early Wednesday for the girl. It describes her as a special education student with a mental age of about 9-year-old. Troyer is white, 5-foot-2, 105 pounds. She was wearing a Wilson High School bowling shirt and hooded Wilson sweat shirt and blue jeans.

Powell is black, 5-foot-9, 220 pounds with short hair dyed blond.