I would tell her to file a police report and let the police find it for her. 

Tell him to file a police report with the serial numbers of everything that was stolen.

Of course most of us self-police and already have 2 night minimum stays, 25+ years of age, and only accept verified guests with ID.But if AIR and VRBO do not step up their game, a lot of cities will take their own initiative....and we don't want that....

Therefore I can remove problem, non paying lodgers within 24 hours with Police assistance if necessary. 

Police in Singapore are actually humane (as opposed to your own boys in blue).

I'd run an insurance history check and I'd check with the fire department and police to see if there had been any emergency calls and what they were about.I’d have the sewer scoped and the typical other inspections.That's all included in the training we provide, plus the rest of the information needed.

I would also generate loud music there and board the house and invade the squatter LOL.Been there, done that.So in some of our city , there's group of 15 years old teenager that keep stealing Kia and Hyundai, the police can't do anything because they're protected by the law LOL now everyone in the city, know this kid address , and sharing their photo ; maybe we could talk to their parent too and begging ooh please don't steal our car.

I even told the code enforcement officer and the police they needed to increase patrols at the property because it was going to be an ongoing issue.

If he's not on the lease, you can try calling the police, but chances are they won't do anything. 

“On July 5 at approximately (2:14 a.m.) several reporting parties advised there were gunshots in the roadway related to a short-term rental property” on East Kimsey Lane, a police report stated.