3 suspects were arrested.
Taken was a suitcase that contained rings, necklaces, watches and other items.
He was indicted in New York for alleged larceny and criminal possession of stolen property.
Another person allegedly involved in the scheme has been charged.
The case is being treated as a homicide.
About $4,000 in jewelry was reported stolen.
The thefts took place in Florida and Virginia.
The region has experienced an increase in robberies, many of them armed.
$1.5M in merchandise was stolen.
He also admitted to failure to file a record of financial transaction.
Among the items stolen were watches by Frederique Constant, Patek Phillipe and Tudor.
About 500 items were taken.
Police believe the crimes were all connected.
Armed robbers forced entry to the store on Tuesday and Thursday mornings.
The thieves have come to be known as the "Rolex Rippers."
The suspect discarded a bag containing additional devices and powder.
They used hammers to smash the display cases.
Authorities say the case involved "exorbitant amounts of pawn transaction."
The Jewelers' Security Alliance has released its annual report for 2020.
Thieves struck in Burlington, Everett and Medford.
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