Police arrested a “strong person of interest” Monday in the brazen Manhattan killing of UnitedHealthcare's CEO after a quick-thinking McDonald’s employee in Pennsylvania alerted authorities to a customer who was found with a weapon and writings linking him to the ambush. The 26-year-old man had a gun believed to be the one used in the killing and writings suggesting his anger with corporate America, police officials said. He was taken into custody after police got a tip that he was eating at a McDonald’s in Altoona, Pennsylvania, NYPD Commissioner Jessica Tisch said at a news conference. He had clothing and a mask similar to those worn by the shooter and a fraudulent New Jersey ID matching one the suspect used to check into a New York City hostel before the shooting, Tisch said. MORE: https://www.wthr.com/article/news/nation-world/hunt-for-unitedhealthcare-ceo-killer-continues/507-97759326-3bb4-48e3-8c73-3759dfdc9930