Tucson, AZ : One worker dead and another critically injured in crash on Friday, August 21 2015

Authorities say one construction worker is dead and another critically injured after a wall of a building being demolished collapsed on them.
Tucson police say the brick and cinder-block building was being demolished for a city road-widening project by a work crew using a back hoe about 2 p.m. Friday.
Two workers were standing near a 15-foot wall when it collapsed.
Tucson Fire Department crews arrived and pulled the workers from the rubble.
They say one worker was pronounced dead at the scene and the second was taken by ambulance to Banner-University Medical Center Tucson with life-threatening injuries.

Source:
1 worker dead, another critically injured after collapse of wall of building being demolished