Maybe They Will Not Be Found Alive

The Crumbley parents.

Likely they are having an OJ in the Bronco moment as it hits them what their son has done.

Would the earlier search warrant have looked for any other guns the parents might have owned in the house? Likely not, right? You're not going to take as evidence from the home unrelated weapons like hunting rifles, I don't think...

With $4,000 in cash, and knowledge perhaps of small backwoods Michigan stores with no cameras, the pair might be planning to stay in Michigan, not hit the road for Florida.

This one might end like the Brian Landrie search, with two bodies being found out there, in time.

There's little they can do to help their son now. He belongs to the State. 

(Not my thinking, but theirs perhaps...)

They might just want to end it, and check out together.  OJ was lucky in that way -- he had a good friend in A.C. Cowlings who seems to have had the wisdom needed at the time of that slow-speed chase that ended in no additional loss of life.

Anyone's.