I didn't think they would catch him alive. I figured it would be "suicide by cop."
Since he tried to hide, I think he wasn't quite into the "martyrdom" idea enough to let himself die for the cause. I frankly don't think either of them were, since they fled from their bombs rather than committing a suicide bombing and they panicked and made a sloppy escape attempt when they were fingered on the news.
Even if he was planning on jumping out of his hiding spot and waving around a gun (or pointing his shoe at them like a gun or something), SWAT just threw in flashbangs and grabbed him while he was disoriented.
Edit: Apparently the boat's owner found the suspect when he saw that the tarp covering his boat was loose and the ropes holding it down had been cut, and he saw a human form lying in a pool of blood inside. He's apparently in "serious condition". I'm guessing that even if he intended to commit suicide by cop after the chase, he wouldn't have had the strength to do so.