Here's another great tip by way of Roy Zur of Cybint. Nearly everyone knows about the Street View feature in Google Maps that lets you get a ground level view from countless streets all around the USA and the world. Don't miss out on the fact that you can select street views captured on multiple dates going back several years in the past.
Click where it says 'Street View' in the upper left and you'll be able to scroll back and forth between images of a street photographed by Google at intervals of several months. It's a great why to collect evidence.