Hmmm, Joplin was supposed to be clean. That's the only reason her contracted was extended to record Pearl. Also, I'm late here, Ed. Did this guy address the wine in Hendrix's lungs???
I've read that Jimi was building Electric Ladyland Studios, and it was costing $1M back then, as he just wanted to stay in the studio and make music. Couldn't the cost of the studio and losing income from the live performances have been a motivation for Jeffries offing him and hence, collecting the insurance money to cover his back?