This question has been addressed in 1 Texas court opinion:
COA05 — February 23, 2026
A defendant convicted of possession with intent to deliver challenged his conviction, arguing that the State was required to prove he knew the specific chemical identity of the drugs (fentanyl) rather than just knowing he possessed a controlled substance (which he believed was oxycodone). The Fifth Court of Appeals analyzed the Texas Health & Safety Code and established precedent regarding culpable mental states, determining that the 'knowing' requirement applies to the illicit nature of the substance generally. The court held that the State must prove a defendant knew they possessed a controlled substance, but does not need to prove they knew its specific chemical name or potency. Additionally, the court ruled that trial courts are not required to define the 'floor' of the burden of proof by including 'clear and convincing' instructions in a criminal jury charge.
Litigation Takeaway
“In high-conflict custody or termination litigation, a parent cannot mitigate a 'knowing' endangerment finding by claiming they were mistaken about a drug's identity; knowledge that a substance is 'controlled' is sufficient to establish the mental state for endangerment regardless of the parent's subjective belief about its specific chemical composition or lethality.”