The two were ejected and then pinned under the ATV.
There have been at least five deadly crashes on Minnesota roads since Thursday.
In both instances, the SUVs rolled.
The victim was transported to a burn unit in the Twin Cities.
The 38-year-old died at the scene.
They are facing criminal sexual conduct and burglary charges.
The 51-year-old was found last Wednesday.
The teenager was loading gear into a vehicle.