Thanks to a fellow blogger at The Big Sheep Blog, I have been alerted to this serious chalk “crime wave”, and the resulting arrests, appeals, lawsuits, and so forth.
Have you been kept in the dark by your local news program? I know I have.
Read about the chalk busts across the nation here, or check out the Big Sheep post linked above.
Meanwhile, be sure to quickly flush your chalk down the toilet if the police knock on your door!
A Clean Surface. 
Gasp – tampering with evidence!