- Police Arrest 23 In Crack Ring On The Upper West Side, Gothamist. 

Here is how grand jury works:

ADA presents the case and introduces the undercover cop(s) who bought the drugs. They detail the entire buy process, using very specific language. 40 times in a row. 

ADA introduces another detective or police officer, who had received the drugs purchased in the sting and had them vouchered as evidence. 40 times in a row. 

ADA reads reports from the NYPD crime lab that verify the substances found were indeed crack cocaine, marijuana, and a handgun. 40 times in a row. 

ADA presents charges in the case, grand jury deliberates on each charge individually, possibly 40 charges. Maybe more.