I have a hard time believing that anyone in the Hurd family would be dumb enough to park MC's car at their own property.
But is it possible that the killer had a reason for going to THAT house and parking MC's car there specifically? In other words, is it possible that MC's killer wanted to place the blame on someone in the Hurd family....or wanted to get them in trouble.
If Mr Hurd was involved in construction, is it possible that the killer could 'strongly dislike' him....hate the competition...have had problems in the past....and wanted him to be out of the picture just like MC was now out of the picture? Kind of a 'kill' two birds with one stone?
Or, if one of the Hurd children was attracted to MC.....maybe a jealous bf, a jealous wannabe, didn't like that the boy was hitting on/flirting with 'his' girl??
Complete guessing here. I know nothing about Wenatchee or Chelan, but it would seem like there would be a closer, better location to place MC's car.