"We believe the workers disposed of between 40 and 60 jars, some of which contained multiple human brains, and worked with a biological waste contractor to do so safely," according to a university statement.
"We have no evidence at this time that any of the brain specimens came from Charles Whitman, though we will continue to investigate those reports."
Tim Schallert, psychology professor and co-curator of the collection, initially told the Austin American-Statesman "we think somebody may have taken the brains, but we don't know at all for sure".