A Springfield police officer who sided with a woman in a dispute with her ex-boyfriend over ownership of a motorcycle is not responsible for any purported violation of the Fourth Amendment, a federal appeals court ruled Wednesday.The 7th U.S. Circuit Court of Appeals held qualified immunity shields Sgt. Jeff Barr from any liability under the U.S. Constitution for failing to block Scott Allin’s ex-girlfriend from taking the motorcycle.There is no evidence Barr acted incompetently or that he knowingly violated the law, …