how do I find out where they tow a car after a wreck in Katy Texas?

Ask the cops.

The police report will say where the cars were towed to.

Go with ^^^

Call the police station.

Usually they tow it wherever you tell them to. Call the local police department, whoever showed at the scene, at ask them.

The police will know, and so will your insurance company. Or if you remember who towed your vehicle, you can ask them. It's not a secret in any case, so nobody has any reason not to tell you.

Ask the local police.