(WJET/WFXP/YourErie.com)– A Mercer County man has been arrested after an hours-long armed standoff with Pennsylvania State Police. According to Pennsylvania State Police Mercer, troopers were called to a home in Coolspring Township, Mercer County on Thursday, Sept. 28 at 11:47 a.m. after a 63-year-old Mercer man allegedly entered his neighbor’s home with a handgun, attempted […]