"RICHMOND, Va. (AP) — A divided federal appeals court on Thursday ruled that an aerial surveillance program used as a crime-fighting tool by the Baltimore Police Department was unconstitutional and said police must stop using any data obtained through the now-defunct program. In its ruling, the Richmond-based 4th U.S. Circuit Court of Appeals said the use of planes equipped with wide-angle high-tech cameras to surveil the city amounted to a warrantless search that violated the Fourth Amendment. 'The AIR (Aerial Investigation Research) program records the movements of a city. With analysis, it can reveal where individuals come and go over an extended period. Because the AIR program enables police to deduce from the whole of individuals’ movements, we hold that accessing its data is a search, and its warrantless operation violates the Fourth Amendment,' Chief Judge Roger Gregory wrote for the majority in the 8-7 ruling...." https://wtop.com/baltimore/2021/06/court-finds-baltimore-aerial-surveillance-unconstitutional/