PORTSMOUTH, R.I. (WPRI) — Gov. Dan McKee has decided not to pardon a Portsmouth man who was tried, convicted and hanged for the murder of his mother centuries ago. Clifton Humphrey penned a letter to McKee last year requesting a posthumous pardon for his distant cousin, Thomas Cornell Jr., who he claims was put to death based on "spectral evidence." In his response to Humphrey and another relative, McKee explained that he could not grant the par…