Some of the people who know what happened can no longer speak for themselves; Joe Paterno died in 2012, and former athletic director Jim Tarman has dementia. Others deny the allegations. Ohio State defensive coordinator Greg Schiano is one; UCLA defensive coordinator Tom Bradley is another. Both say they saw no evidence of abuse. But what’s clear is that they could help victims understand Penn State’s climate, why it was not conducive to believing reports and taking action against Sandusky sooner.