Lazy or Lame?

It must be my fascination with dumb criminals that repeatedly draws me back to their feeble attempts at their chosen profession,but I can't seem to figure out if they are too lazy to make their crimes work,or if they are too lame to consider the mistakes that end up being their downfall. Today's example is a 26 year old male  burglar in Wyoming who left behind a half eaten peanut butter and jelly sandwich while robbing an equipment store in the early part of September. The police sent it in for DNA testing and by the time they had the results he had committed two more burglaries at the same business and two at a J.C. Penney where he left a coffee cup with matching DNA. The man had pawned the power equipment and tools but was still in possession of jewelry from Penney's. How hard would it have been for him to either eat the sandwich before or after? and the coffee cup? Chances are if he had bothered throwing the cup into a trash receptacle no one would have noticed it. Maybe they really do want to be caught.