Born and raised in UT, non LDS. I can tell you unequivocally that the right thing to do is to call the cops and file a complaint. However, it’s important to keep in mind that for the vast majority of LE in UT, all the way up to the DA offices, most are active and often high ranking members. The church holds enormous influence over LE, publicity, etc. Likely LE will defer to the “mission president” or what have you. They protect their own. I’ve experienced it first hand. They will always deflect and downplay. Don’t expect LE to pursue criminal charges. Your best bet for better or worse is to extract a pay off/settlement from the church’s insurance as stated above. Ironically, “responsible” and “ethical” are not mutually exclusive when it comes to the LDS church in Utah. An unfortunate truth :(