A Mattapan man was held on $1 million cash bail today following his arraignment for trafficking in one of the largest quantities of marijuana ever seized in Boston, Suffolk County District Attorney Daniel F. Conley said.

EDGAR GONZALEZ (D.O.B. 6/15/69), a.k.a. FELIX BAEZ SOTO, was also held on an immigration detainer lodged by U.S. Immigrations and Customs Enforcement. In addition to setting the high bail, Judge Rosalind Miller ordered Gonzalez to return to court on June 30.

“This is the single largest seizure of marijuana in recent memory,” Conley said. “Detectives said they hadn’t seen such a quantity in at least 20 years.”

Gonzalez was charged with trafficking in 2,000 to 10,000 lbs of marijuana, an offense punishable by up to 15 years in state prison.

Boston, state, and federal authorities were executing an unrelated search warrant yesterday morning at 32 Wilcock St. when their attention was drawn to a man fleeing the residence. That man, later identified as Gonzalez, was apprehended at Courtland and Greendale streets in short order.

Boston Police observed the rear door to Gonzalez’ apartment to be open. In light of the existing search warrant and Gonzalez’ flight, Boston Police announced their office and conducted a protective sweep of that apartment.

Once inside, the officers detected a strong odor of marijuana. In a front room, they observed a large quantity of plastic bundles from which the odor appeared to emanate. The officers completed the sweep and then froze the residence pending a court-authorized search warrant.

Later the same day, Boston Police obtained a warrant to search Gonzalez’s apartment. Inside, they found approximately 2,000 lbs of marijuana in 40 plastic-wrapped bales. The officers additionally found rolls of plastic shrink wrap, digital scales, and a vacuum sealer. A Dominican Republic passport was also recovered: it featured the defendant’s photo and but gave his name as Felix Soto.

Gonzalez was represented today by attorney Holly Clarke.