(December 14, 2020, 9:15 AM EST) -- BATON ROUGE, La. — A Louisiana federal magistrate judge on Nov. 30 ruled that a police department’s proposed expert is barred from testifying that probable cause existed when police arrested a man protesting in the wake of a police-involved shooting, also finding that the expert can’t speak to the reasonableness of force used during the arrest (Travis Day v. Baton Rouge City Police, et al., No. 17-328, M.D. La., 2020 U.S. Dist. LEXIS 223670)....