I was checking the Seattle Times this morning and they have updated a story that broke last Monday.
Here is the blurb:

Seattle police Thursday night arrested a suspect they believe was responsible for the slaying of a man whose body was found at a downtown Seattle construction site earlier this week.

The suspect, a man in his 20s, was arrested by Seattle police about 7 p.m. in Federal Way. He was questioned by detectives Thursday evening and was expected to be booked into the King County Jail for investigation of murder, police said.

Police had been investigating a possible link between the victim found at the construction site, in the 900 block of 7th Avenue, and a man who died Tuesday in an explosion at an east Pierce County home. Detectives now say they are confident the man involved in the explosion was not connected to the man found at the construction site.

There really isn’t much more I can say about this.  At least they found someone.