Let's see here..................
What we know:
We have 3 friends that borrow an SUV and a trailer, with an ATV on it, from a friend.
The SUV is found with a bullet hole(s) and lots of blood on the seats. The ATV and trailer are nowhere to be found.
The owner of the SUV was not there, doesn't know anything about it, and has been cleared by the cops.
The three guys that are missing all have felony records for either drugs or burglary.
What we don't know: If they were planning to meet someone out on the trails to go ride with.
What better place to do a drug deal than out in the boonies with no prying eyes and no way anybody could sneak up on you.
Sounds like, and looks like, an ambush.......I doubt they were strangers to each other.
They meet up with somebody to make a deal, they get capped, robbed, and ambushed while they are sitting in the SUV grouped together.
The perps disconnect the trailer and re-hook it to their vehicle. The bodies are dumped out on the ground, and maybe buried, maybe not.
The SUV is driven to some pre-arranged location, or a random location and left while the driver hops back in with the other bad guy. Off they go with their new toy and their new toy hauler.
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I'd say they need to get out there and do some tracking for both tire tracks and human scent. The SUV may have been parked on pavement to act as a diversion and to eliminate tire tracks to the scene of the crime.
Of course, one of the three could have double crossed the other two, with the help of a friend and a vehicle.
Sounds like something right out of "The Sons of Anarchy" play book.