I suspect he's referring to the previous owners/tenants of that house (where AJ was found) having the same last name as his sister's married name. Although, she's (his sister Wendy) on record via MSM as saying she's not at all related to those folks, and they're also on record saying the same. I suppose NPD dug deep enough to confirm that, or there'd have been charges filed already.
I'll be honest: if I knew NOTHING about this case and began reading about it today, I'd smell a set-up as well. Way too many coincidences, unanswered questions and shady conduct by more than a few connected to AJ in one way or another. Not that his idiocy with the break in and the dog/jacket helped matters in any way but I think there is legitimate reason to believe it's *possible* he has been thrown under the bus. For the record, he's still a creep, even if he didn't hurt AJ, and he's right where he belongs.
MOO & all that.