I have been receiving calls reference tow trucks unloading vehicles towed from private parking lots without the consent of the vehicle's owner at parking lots, not considered a licensed vehicle storage facility. This practice is called "stashing impounds" and is highly illegal.
According to the Texas Towing Law, Occupations Code 2308.205:
(a) A towing company that makes a nonconsent tow shall tow the vehicle to a vehicle storage facility that is operated by a person who holds a license to operate the facility under Chapter 2303, unless the towing company agrees to take the vehicle to a location designated by the vehicle's owner.
Should anyone witness tow trucks unloading vehicles on a private parking lot, then hurrying away to tow more nonconsent towed vehicle, don't hesitate reporting this illegal activity to 911.
Also, if you can, videotape this illegal conduct without being seen and file an online complaint with the Texas Department of Licensing & Regulation, once the complaint has been filed and you receive a tracking number, email the video or photos to firstname.lastname@example.org.