stories are out there that Drake & Travis Scott both hit up a strip club after the concert.
They went to a DAVE N BUSTERS after the show not a STRIP CLUB! Then left when they heard about fatalities.
Drake, however went to a prescheduled after party at a strip club and dropped $1 MILLION (tm Dr. Evil) the NEXT NIGHT which is even worse tbh. But I guess some people process grief differently. Jfc.
Honestly though, at event of that scale with the stupid crazy lighting and stuff that I'm assuming they had going, I could definitely see how he didn't notice until hours after the show! Sometimes crazy shit happens in the crowd at shows that I do that I don't notice while I'm onstage and I'm playing venues that are 1000x smaller (and incidents are 1000x less crazy than this FYI).
BUT like al said, if you're organizing an event of that scale, it is on you to be able to see if crowd crushing is happening.