My father passed away his roommates are holding his stuff from me how do i get his belongings?

I'm sorry for your loss.  The answer to your question depends on some details you didn't provide.  If your father's total assets are worth less than $25,000, you can use the small estate probate process.  If this is the case, you would sign a court form (I believe it is called a small estate affidavit in Tennessee, that's what it's called in Maine) and provide your father's death certificate to the probate court, you then would receive authority from the court to take control of all of your father's assets, including his personal belongings.  If his assets are worth more than $25,000, you will need to go through probate process to be appointed executor of your father's estate.  Again, you would contact the probate court to obtain the necessary forms.  Go to (or call) the probate court in the county where your father lived.  Nolo.com has some specific informaiton about Tennessee probate process, and the county probate court probably has a website too.  Good luck.