NEW YORK (CBSNewYork) — Four people have been arraigned on charges in a 20-count indictment in connection with a Chicago-to-New York drug trafficking ring following a three-month investigation.

The suspects were arrested on March 20 during a police raid in Harlem.

During the week leading up to the arrests, prosecutors said Juan Honorio and Rafael Oliveras had driven to Chicago to arrange a drug shipment.

On the night of their arrests, prosecutors said they tried to ditch the drugs as police tried to make their way into the apartment.

Police saw 38-year-old Rudy Cabrera, the duo’s alleged Chicago supplier, tossing a kilogram of heroin from a 13th floor window, prosecutors said.

“This appeared to be a fairly sizable organization,” Special Narcotics Prosecutor Bridget B. Brennan told 1010 WINS. “A kilogram of heroin is enough to produce tens of thousands of glassines of heroin and obviously that would supply many, many people in the metropolitan area.”

There was also evidence in the apartment that cocaine had been flushed down a sink and toilet, prosecutors said.

Police seized 20 grams of cocaine, a drug press, surveillance equipment, drug ledgers, bank records and two vehicles during the raid.

The investigation into the alleged operation kicked off in December after Honorio and Oliveras allegedly sold a gun and about 100 grams of cocaine to an undercover police officer.

Prosecutors said the duo made at least four more sales of drugs and guns over the next two months totaling over $19,000.

Charges in the case include criminal possession of a controlled substance, evidence tampering and criminal sale of a firearm.

Honorio, Cabrera and Oliveras have been held without bail since last month.

A fourth suspect, Jaime Gonzalez-Campo, of Elizabeth, N.J., is being held on a fugitive warrant pending extradition to Chicago on unrelated charges.

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