4th suspect in WSU beating in custody

<p>David Warner</p>

David Warner

PULLMAN, Wash. (AP) -- The fourth and final suspect in the beating of a Washington State University instructor is in custody.

Pullman police say 22-year-old Robert D. Bean turned himself in at the Whitman County sheriff's office at 9:20 a.m. Friday and was booked into jail for investigation of assault.

Another man turned himself in early Friday to Pullman police and another man and a woman were arrested earlier in the week.

Although all four suspects are in custody police say they're still investigating how David Warner suffered head injuries March 30 near campus.

Sacred Heart Medical Center in Spokane says he's in serious condition Friday in intensive care.