What your friend should do depends on how your friend wants to handle the case.
For example, if he wants to fight the case, the fact that he does not in any way fit the description of the man who is on the police report may be helpful to the defense, because it may look like police arrested the wrong man or that the police were very sloppy in the way they did their job.
On the other hand, if your friend is not interested in going to trial
on the case but he wants a deal, the information on the police report doesn't really matter, except that it might help his lawyer negotiate a dismissal or get him a better deal.
It's the information on the RAP sheet that really should be correct. To change that, if there's a problem there, your friend would have to write to the NYS Division of Criminal Justice
Services (DCJS). They are the agency that maintains the criminal records
for the state. He could ask them to correct his record:
But the police reports? He can bring that to the attention of the judge and the DA, but as I have indicated any mistakes made on police reports are usually good news for the defendant.