This.
I'm probably one of the few who thinks it's certainly possible that Houlihan inadvertently ingested a prohibited substance versus intentionally doping.
But she still tested positive for nandrolone, a substance that was QUITE popular in the early 2000s. There is absolutely NO way any coach worth their salt has 'never heard of it before.'
That's like me claiming to have never heard of EPO, yet following the sport since the '90s.