There is no doubt that LE blundered this search on so many levels, HOWEVER, I hesitate to blame them too quickly for not following up on these leads. Nobody said they "found" the car, only that the area should be checked as he had lived in that area. They got 1,000's of tips from OK to TX to CA, he'd lived in all those places or had family, they were all options and it just isn't possible to check them all. There was nothing to my knowledge that made this area more likely than many of the other areas. It's just a sad fact.
I guess my question is, if you're a concerned citizen, an old next door neighbor and you think that area should be checked why not do it yourself? 2 months later you know that you're odds are in your favor that you will be safe, that he's not going to be parked out there alive. If you're so sure, why do nothing? Go check your property, get your neighbors together and do a search of all your properties. I truly believe we need to not sit idly by waiting, we can all do a little part, whether that's on here sleuthing or checking your own back yard (literally).
I hope her family can find peace out of this nightmare. Aja, you are with the angels, be free sweetheart.