I've heard this story before.City inspection logs showed Treadaway gave contractors at the Hard Rock site the approval to pour slab on the 14th floor. Instead, GPS data from the city vehicle showed on that July day, Treadaway made a morning stop in Treme, then went to the Westbank, stopping at the University of Holy Cross, his home in Gretna and an Ochsner Clinic -- but not near the Hard Rock Hotel site.
https://en.wikipedia.org/wiki/2013_Philadelphia_building_collapse
tl;dr The L&I inspector did the same thing. He killed himself out of guilt.