Gov. Maura Healey ordered an inspection of all state-run emergency shelters and a “full review” of the intake process after one Dominican migrant was arrested at a site in Revere while allegedly possessing an AR-15 and about $1 million worth of fentanyl, the governor said in a statement.

“It’s outrageous that this individual took advantage of our shelter system to engage in criminal activity,” Healey said in a statement to the Herald Monday. “I’ve ordered an inspection of all shelter units, beginning with the Revere site, and a full review of our intake processes to determine any additional steps that we can take to prevent criminal activity in shelters.”

Healey issued the order after Leonardo Andujar Sanchez, 28, a migrant from the Dominican Republic in the country illegally, was arrested Dec. 27 at a Quality Inn in Revere housing migrants.

The first-term Democrat said her administration has been in touch with local law enforcement and federal immigration officials regarding Sanchez’s case.

“This further underscores our broken federal immigration system and the urgent need for Congress and the White House to act on a border security bill to prevent criminals from entering our communities. The people of Massachusetts should not continue to have to deal with the impacts of federal inaction,” Healey said.

Sanchez was arraigned in Chelsea District Court late last month on 11 charges, including 10 firearm possession counts and one related to possession of nearly five kilograms of fentanyl, according to court records. He was ordered held until the end of April following a dangerousness hearing.

The inspection and intake review comes as a growing chorus of lawmakers have demanded more information on how Sanchez ended up in an emergency shelter system the Healey administration has repeatedly said is only available to residents from Massachusetts or migrants who were lawfully allowed into the United States.

In a letter delivered to Healey and Housing Secretary Ed Augustus, all 25 members of the Massachusetts House Republican caucus questioned how Sanchez was able to access the system given the strict eligibility requirements in place to qualify for services.

“There are long-term residents of Massachusetts who have been on waiting lists for the emergency family shelter program, yet an individual here illegally, breaking our laws and putting our citizens at risk by running a drug ring with fentanyl and cocaine, somehow got priority over other deserving long-term, lawful Massachusetts residents,” the letter said.

After a 26-year-old Haitian national was charged with raping a 15-year-old migrant girl at a Rockland shelter last year, Healey said everyone who enters state-run shelters is “vetted.”

At the time, Healey said the state had the “security and systems in place,” including vetting processes, but “it is unfortunate that from time to time, things will happen anywhere, not just in shelter, but anywhere.”

A spokesperson for the Executive Office of Housing and Livable Communities, which partially oversees the state-run shelter system, said officials conduct warrant checks on shelter residents every 30 days and all residents undergo background checks when they apply for services.

Attorney John Benzan, a lawyer Sanchez hired to represent him, previously confirmed to the Herald that Sanchez was from the Dominican Republic and a spokesperson for the state’s housing agency said Sanchez and his family had been staying at the Revere shelter site since Oct. 15.

Sanchez was arraigned in Chelsea District Court on Dec. 30 and was ordered held last week until the end of April.

U.S. Immigration and Customs Enforcement’s Enforcement and Removal Operations Boston previously told the Herald the agency has lodged an immigration detainer against Sanchez and the suspect faces deportation.

Of the 11 charges Sanchez faces, 10 are firearm-related, including unlicensed possession of an “assault weapon,” illegal possession, lack of a firearms identification card, possession of a large-capacity feeding device, and “alien” in possession of a firearm, according to court records.

The remaining charge accuses Sanchez of trafficking “200 grams or more” of “heroin/morphine/opium/fentanyl,” though court records make clear that Sanchez allegedly had 4.9 kilos of deadly drugs.

Benzan previously told the Herald that the charges are “just allegations at this point and we are going to fight this case tooth and nail and we are going to hold the commonwealth to the standard that they have to prove every element of every charge to a reasonable doubt.”