Major crimes Puns

I was having a discussion with my parents about all of the different subjects you can major in at my university. I brought up that one my childhood friends was majoring in Criminology. My mom mentioned that Criminology majors don't make a lot of money out of college. My dad started to chuckle. We all looked at him knowing what was about to happen.
"I guess it's true than." "What?" "Crime doesn't pay." He then proceeded to laugh to himself throughout the rest of dinner.

"Hey Robosho, did you know that there was a major crime today in the Central Valley (California, all this part is true). The thieves got away with stealing over 400,000 dollars worth of walnuts"

Then he added, "yea, the cops called it a real nutcase"

And with a huge grin on his face, he ended , "I made that last part up"