Yes, JR has a sister that has commented on Rexburg PD FB page, she also said it was weeks before his body was found.
Yes, she is also a very active member of the group that posted the ME report and comments several times on that particular thread. At one point she even repeats that he wasn't found for 3 weeks but doesn't contradict that it is the actual ME report. MOO - She says Joe was estranged from his siblings so I really think the 3 week rumor got passed among family members after the fact and she's not picking up that the ME report contradicts that.