or if they had previously been asked to leave or if their conduct met one of the elements in the statute:

Under Utah law, trespassing is defined as "entering or remaining on the property of another, when such presence is prohibited by a sign or other notice or:

a. intending to cause annoyance or injury to any person or to damage any property, including the use of graffiti,
b. intending to commit any crime other than theft or a felony, or
c. being reckless as to whether his presence will cause fear for the safety of another."