The suspect in the brutal beating of a man who's body was dumped at a South Seattle construction site is under arrest Tuesday night.

Thomas Mcmahon
We featured Thomas Mcmahon a week ago in our Crimestoppers Most Wanted segment.
Late Tuesday afternoon, detectives spotted him driving his pickup truck on North 87th Street and took him into custody.
Mcmahon was wanted in connection with the murder of a 62 year old mentally ill man at a group home in North Seattle.
Five others have also been arrested.
Police are still searching for Mcmahon's 1992 Light blue Chevy Pick Up.
Washington License plate number: A82078S.

They believe the suspect used the truck to transport the victim. If you have any information, please call Crimestoppers.