Tenants expect the landlord to pay for motion detection, fire alarm service. 

I have visited there homes often and cannot detect the first hint of smoke.

THC can be detected for up to 30 days in the body.

When it detects motion, it lights up and starts recording to an SD card.

But there are also alternatives:Install a home security system.Get a dog.Landscape wisely.Put up motion detecting outdoor lights.Install window and door alarms.Put in smarter locks.Install fake security cameras.Look like you’re home.The better question is: how does your tenant feel about it?

Or are they all local reports and it is up to me to do the comparative detective work? 

I'll make sure to mention the cameras but they're clear as day on the sides of the house and shine a bright light when motion is detected.

I would recommend reading the book Landlording On Autopilot, written by police detective turned real estate investor.

I’m a child abuse detective with aspirations of acquiring buy and hold properties in the next 12-18 months.

Also, rodent droppings were detected.