WAUWATOSA, Wis. (AP) -

The state Justice Department says investigators are questioning a person of interest in the shooting death of a police officer patrolling in suburban Milwaukee on Christmas Eve.

Wauwatosa police discovered their colleague, 30-year-old Jennifer L. Sebena, dead early Monday morning a couple hours after she failed to respond to radio calls. She'd suffered several gunshot wounds.

Police and state agents released a statement Wednesday saying they were working with a person of interest. The Justice Department released a statement later Wednesday saying investigators were questioning that person.

They say the public is in no immediate danger.