How do I find the serial number of my stolen macbook?

I recently had stolen my macbook, macbook pro and iphone....and other than retrieving the MEID number of my Iphone, I did not have the serial numbers of the macbooks listed anywhere and I also bought these used online so I did not have a receipt with the serial number either. I did not have an icloud, any retrieving software, nor itunes. I did though bring them into the apple store after buying them and had them cleared for my own use and also listed them as devices on my apple account. After discussing this matter with apple and checking my devices, it came to our attention that my device list had fell off my account due to the person who stole them had cleared them with apple, which automatically puts the macbook devices onto a new account. Does anyone have any ideas? I need the serial numbers for the police report.