Also the city likes to pick on the landlords of these properties that the tenants destroy to make themselves look good in front of the camera.    

Try searching on the Boulder Camera's web site and I think you'll find details. 

If he actually complains he doesn't have a picture/video of that ask him why not, since everyone has cameras on their cell phones these days and if your contractor was using that much water there should have been plenty of time to get pictures/video of it.

I also walked through with a DSLR camera and took pictures of everything that I would send to anyone who asked.

My last house & this one is a fortress, lit up like a bank at night, alarm system, cameras all over & me heavily armed inside.

This sounds much easier than getting someone to put a camera in the downspout and or snaking them.

Good pictures with a good camera make all the difference in the world.

They still have a very good reputation for cameras and lenses.

Then I paid to have a company come out with a camera and scope the drain under the street all the way to the main sewer.

You really can't do much to deter the thieves but install a security system, motion detection lighting on the front/side and back of the house and even a camera that records the inside/outside of the property.