In Texas, When Is It Necessary For Police To Obtain Consent To Search? Is There An Online Resource Available?
In the state of Texas, do the police need consent to perform a personal search? What about a search of a vehicle? Under what circumstances is a warrant required? Is there an online source outlining any changes made as a result of Homeland Security that can be relied upon to be accurate and is in layman’s terms? Has anyone contested the legality of pre-trial drug testing?
Search and seizure is covered by the Fourth Amendment, so it is the same in all states.
Consent to search is just that, consent, and can be requested under any circumstance.
There is case law on a protective search, Terry v. Ohio (commonly called a Terry Stop). It states an officer can search you for weapons any time he can articulate a concern for his safety. As far as a full search, that requires probable cause. The only search of a person that would require a warrant is one that is intrusive; such as a body cavity search, or collecting a DNA sample from blood or hair.
A search of a vehicle is covered under Carroll v. United States (The Carroll Doctrine). It states because a vehicle is mobile, and because there is a lesser expectation of privacy in a vehicle on a public road, a warrant is not needed. The officer only needs a reasonable suspicion the search will turn up something illegal.
As far as pre-trial drug testing, that would have to be ordered by a judge, and can be contested by a defense attorney.