by Kimberly La Fronz*
When conducting a warrantless search or seizure, must a police officer have probable cause for all elements of the crime, including mens rea? In this Contribution, Kimberly La Fronz (’18) discusses what the circuits include in their totality of the circumstances analysis to determine probable cause. This Contribution argues that in order to effect a warrantless arrest a police officer must have probable cause with respect to every element of the crime in order to effect a warrantless arrest and must not ignore exonerating evidence in their totality of the circumstances analysis.