"Was it his dad that turned him in?" I asked, trying to clarify.
"A family member," the chief responded.
The teenager is now charged with first degree murder.
His family members have told reporters that they are "in shock" and that their "heart goes out to the victim."
Investigators said other charges are pending in this case, which they won't discuss because they're still building a case against Jones.
Friends said on Tross' Facebook page that she often walked the Pinellas Trail as a stress release.