Appeal launched after discovering a shotgun was fired into a bus

Police are appealing for witnesses after discovering a shotgun was fired into a bus in Palfrey, Walsall last month.
 
A man was travelling down Weston Street on the number 4 Diamond bus and talking on his phone when it seemingly exploded by his ear and shattered the bus window.
 
He was taken to hospital after the incident at 7.45pm on 22 November but was unable to account for what happened.
 
Surgery revealed metal fragments lodged in his head and ear, tests later confirmed the f