The absence of yellow police tape around the complex.
More seriously, I could check the police crime databases to get a sense for what crime is like in the area, with the understanding that police departments (esp Henderson) can sometimes under-report crimes to make their stats look better. Here are the links:
Las Vegas:
https://www.crimemapping.com/map/nv/lasvegas
Henderson:
https://www.cityofhenderson.com/police/crime-search