Michael Turner stands outside the Pittsburgh Target where he and three friends stopped a mentally ill man from going on a stabbing rampage.
WPXI SCREENSHOT

Two years ago, Michael Turner went after a homeless, mentally ill Pittsburgh man who stabbed his friend Jobe Wright in the shoulder for no apparent reason.

Turner and his three friends—Wright, Roland Smith and Tyreek Walker—learned that the man, 41-year-old Leon Walls, had gone inside a nearby Target, so they went inside to find the man