Because the man wasn't following court decorum.
He's a lawyer, he should know better.
Putting up Costello was a huge mistake. He portrayed himself as Cohen's Lawyer, when in fact, he was doing the bidding of Trump to try to silence him. It's like being on trial for Cannibalism and then snacking on an arm.
The DOJ and FEC were stacked with Trump loyalists blocking accountability.
If AMI and Cohen did this with Trump's knowledge, it was a violation on Trump's part. This isn't like Granny Gulch sending an extra check, this is was in full coordination with Trump.
Except no services were provided, it was a payoff.
If it was a legitimate charge, it should have been paid AT THE TIME IN FULL. Not over time to try to hide what it was for.