If you listened to his 'speech' during the no bill

I think there were 60 something witenesses...

...and he discredited each and every one in some sort of way

the witnesses that verified the hands up story

he explicityly stated, had parts of their testimony, PARTS, contradicted by physical evidence

the witnesses that verified Wilson's Hulk Hogan story

were also contradicted by physical evidence

but McCulloch didn't explicityly state that

which is probably how he presented to the grand jury

explicitly discredited pro Mike Brown testimony

but didn't do the same for pro Wilson testimony

he left it up to the jury to figure that out for themselves

which they obviously didn't

I don't see the gotcha moment here

i.e., he intentionally admiited evidence he KNEW was false

the only story I need to hear is Dorian Johnson.

giving the grand jury a statute for justified lethal force

that the supreme court already struck down

is more of a smoking gun IMO