Can my former employer continue to use the programs I wrote after I'm gone?

I worked for a manufacturing company, through a staffing agency, running a machine and drawing CAD files. I was laid off yesterday. When I went to collect my belongings I was informed that they had broken into my personal laptop, which I used to write the programs, to "get our files off of your computer". They had done this the previous day, while I was out sick, before they let me know that I had been laid off. They deleted all of "their" files from my laptop,which included CAD files that I had personally created from scratch, and some personal files that I had on there as well. I wrote most of the programs on my own laptop using my own camera and measuring equipment due to the fact that most of theirs was sub par and nearly unusable on most projects. Is there any recourse that I can take?