A Mississippi gunmaker and his wife were shot dead by a relative over a land dispute before he barricaded himself in a bathroom and took his own life, authorities revealed. Walter Earnest Birdsong Jr., 62, and his wife Amanda Lynn Birdsong, 43, were killed by Kurt Birdsong inside their Florence home on Friday afternoon, cops told WLBT . The shooting stemmed from a near decade-long dispute where Kurt, 56, claimed he wasn’t given a piece of land he said was promised to him by his late dad. Walter and Amanda Birdsong was killed by relative Kurt Birdsong over a dispute about land, police said. Amanda Birdsong / Facebook Kurt, armed with at least two guns, stormed into Walter and Amanda’s home before shooting them several times, Tide News reported. Then, he barricaded himself in a bathroom where he was later found dead with an apparent self-inflicted gunshot wound – following a three-hour standoff. The 911 caller who reported the shooting to cops revealed that the gunman had not fled the scene.…