I can detect smells most people just don't notice.Use an Ultraviolet light in the dark and animal pee will glow.

Then, we could be completely wrong.If you want to play detective, it appears you know the name of the owner, you can try the local probate court to see if there is a file open.

The scan detected an anomaly between the grass and driveway.

Dog apparently just lifted his leg against every corner.Once you've removed drywall, air out again for a few days and see what's detectable.  

Your pre-screening efforts seem more of an enjoyment/detective work, though hard to believe in this day and age, it is still possible to hide your info from google searches.

This property had a small amount water came out from an area in the ground of a bathroom.The water was cumulated at the concrete around the PVC pipe which vertically comes out from the ground.The water eventually caused the surrounding small area carpet and laminate floor wet.I hired 3 plumbing companies in sequence (because the previous one cannot detect the leak but the water was still there).None of them was able to detect there is leak either from the slab or from the above ground pipe.I took the 3rd plumbing company’s advice to wait for a while.They said that it could be due to some special weather condition and there were water cumulated under the ground.And the water kindly climbs up to the surface.

You somtimes need to be that detective.  

Need a professional with Thermal technology detection equipment or whatever needs to be done asap.  

The property manager got a police report today and is going to speak with a detective this afternoon.

Did you try to detect all leaks with American Leak Detection and fix them?