Merchan BETTER allow Costello to testify; he is directly knowledgeable about contrary evidence to what Cohen is stating.
The defense is allowed to put on whatever witnesses they chose to, that corrupt judge has no say..the OJ Defense team brought in that woman who had taped Mark Fuhrman saying the N word 10 million times to destroy his credibility, Costello should be allowed to testify to destroy what 1 percent of cred Cohen has left
Reversible error if he refuses. Prosecution cannot claim surprise. He testified in front of the GJ.
All hell will break loose if Costello is barred from testifying. The Trump defense team has many options if this scumbag judge crosses that rubicon