Murdered. Didn’t the contractor confess on his deathbed?
https://www.mojo4music.com/articles/15989/brian-jones-it-was-murder
Dunno. I don’t know that I’d ever heard it was suspicious. Brian Jones was already a wreck and had been pushed out of the band so I’m not sure what there would have been to gain by the handyman... not that murder necessarily has logic.