I would like to read more on this. If the explosives weren't wired, and depending on other evidence, he may have been telling the truth (he was turning it in wanting to inform..)
..waiting for all the court docs to be released..
Fuses, grenades - consistent with his story. It's the nails that would be the sticking point with me. Then again, I suppose nails will be outlawed in several European countries in the coming years so maybe he was just ahead of the curve - did he have any pointy steak knives too?