First of all, my deepest condolences to the victims of this terrorist act. There are no words that can counterweight the tragedy of this. There may however, be future actions that those who abhor these kinds of deeds can take to discourage them in the future. But that is not ours to commission.
Richard sent in the following links which I will try and summarize.
1. Saudi suspect not seen for 2 days by roommate prior to the bombing, moved in 5 months ago. NY Post.
Also works part time as a towel dispenser
2. The Saudi man of interest, Abdul Rahman Ali Alharbi at Debbie Schlussel (H/T Tundra Tabloids)
3. ‘He’s a quiet, devout Muslim – he couldn’t do that’: -Neighbors Daily Mail
4.Boston News, Weather, Sports | FOX 25 | MyFoxBoston
Room mate of the Saudi person of interest
I may be wrong but from the simplicity of the devices and the fact that they worked and that the attack wasn’t detected I think the bombers were trained pros.