For a police report, I would file where he lives. For a lawsuit, you can file where he lives or where he manages the property/where his (supposed) business is located.
Although in Texas several different offenses fall under the broad category of "theft," the specific theft crime that your property manager seems to have committed is embezzlement. He was entrusted with cash generated from your business and he (apparently) misappropriated it for his own financial gain.
That said, you will want to be sure of your facts. Read over the contract you have with the property manager. If he was to take from the rent receipts any money necessary for the maintenance and repair of the property/properties, it is possible that there were expenses greater than the money collected.