The United States Supreme Court in 2014 ruled in Heien v. North Carolina, 135 S. Ct. 530 (affirming State v. Heien, 366 N.C. 271 (2012)), that an officer’s objectively reasonable mistake of law in making a stop or arrest is reasonable under the Fourth Amendment. Last week, the North Carolina Court of Appeals ruled in State v. Eldridge (September 20, 2016), that officer’s mistake of law when making a stop of a vehicle was not objectively reasonable based on the facts in that case. The Eldridge ruling is the subject of this post.