A fourth law enforcement officer died hours after a standoff at a Charlotte, North Carolina, home Monday. Charlotte-Mecklenburg police officer Joshua Eyer was the fourth victim killed; four other officers were injured. The other three officers killed were initially reported to be US Marshals, but the AP reports just one was a US Marshal. The other two were officers from the state Department of Adult Correction. Monday was a grim day for law enforcement in Charlotte, North Carolina. Authorities say three officers were killed and five others were injured as a US Marshals Fugitive Task Force trie…