Exigent search refers to the search without any warrant which is carried out as a result of a sudden emergency. Exigent search is usually performed to preserve evidence or to ensure the safety of the arresting officers.
In Johnson v. State, 161 S.W.3d 176 (Tex. App. Texarkana 2005), it was observed that the subsequent seizure of evidence already discovered during an exigent search does not further invade privacy rights and therefore is constitutionally permissible.