Beta Theta Pi pledge dies at Penn State

[GreekOne]

From what I've read, the social took place before the "gauntlet" began and the women had all left.

Actually, the gauntlet took place after a short ritual. The social was to begin after that. If you read the timeline presented by the DA, the women were there when Tim fell. I have read reports that they spoke with him after his fall and they reported that he said he "was okay". So, they were definitely in a position to call 911 if they felt that his condition required medical attention.