A peace officer may arrest an offender without a warrant for any offense committed in his presence or within his view. What Constitutes an Arrest Without a Warrant in Texas?Following a valid traffic stop or detention, the officer may be able to arrest that individual immediately and without an arrest warrant. It's absolutely legal. Arrest under a warrant requires "reliable knowledge of the existence of a valid warrant". A police officer can arrest you without a warrant, of course. But that's far from an unlimited power. Prior to probable cause for the arrest, there must be reasonable suspicion for the stop. The Texas Legislature has acknowledged that certain circumstances justify the use of arrest powers even though a warrant has not been issued. There are many possible paths you can take when Dallas County has an outstanding warrant for your arrest.