"Politely holding a door open for a police officer has landed a Massachusetts man in jail. Authorities say Kayvon Mavaddat was at the Natick Mall on Friday when he held the door for the leaving officer. That officer thought Mavaddat looked familiar, and went to check his cruiser’s computer. The officer found there were three warrants out for his arrest — for heroin possession, shoplifting and driving with a suspended license. The officer returned to the mall and arrested the 28-year-old Mavaddat...."