If you hit someone from behind in TX & the person you it didn't use a blinker and didn't have tail lights, is?

If I am reading your post right??? lead vehicle didn't have legally required taillights- a unsafe vehicle- and you hit it? two points to consider- following too close for conditions and non compliant to code vehicle means fault in civil case will be undetermined from what you stated. Need more info. A traffic hazard- as in lead vehicle- can be held at fault for .