The son of a school caretaker who was stabbed to death by paranoid schizophrenic Valdo Calocane has told an inquiry he found out his father had died through an Instagram message from a family friend.Lee Coates, another son of Ian Coates, told the Press Association he believes police could have prevented his dad's death and the injuries to three people who were hit by the caretaker's van which triple killer Valdo Calocane stole.

The son of a school caretaker who was stabbed to death by paranoid schizophrenic Valdo Calocane has told an inquiry he found out his father had died through an Instagram message from a family friend.Lee Coates, another son of Ian Coates, told the Press Association he believes police could have prevented his dad's death and the injuries to three people who were hit by the caretaker's van which triple killer Valdo Calocane stole.