They almost caught him with his pants down.

An illegal immigrant from Venezuela with suspected ties to the Tren de Aragua gang was arrested outside a New York City a migrant shelter after allegedly breaking into a Manhattan prosecutor’s apartment, pleasuring himself and robbing her, according to a new report.

Brandon Simosa, 25, followed the unidentified 38-year-old woman into her apartment building near the intersection of 44th Street and Ninth Avenue around 2 a.m., according to the NYPD.

Once inside, he demanded cash and stole credit cards and a cell phone from her purse. He then allegedly “performed a lewd act in front of the woman” and fled, police said.

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The Row NYC Hotel in Manhattan has been turned into a migrant shelter. (Matthew McDermott for Fox News Digital)

The suspect is a illegal immigrant with suspected ties to the infamous Venezuelan prison gang, and the victim works for Manhattan District Attorney Alvin Bragg, New York Post reported.

The “lewd act” was him allegedly masturbating in the hallway before take-off, only to be arrested outside the Row, according to the newspaper.

The Row is a former luxury hotel that city officials turned into a migrant shelter to help house the tens of thousands of illegals who flooded the Big Apple under the Biden-Harris administration.

Police caught him on Tuesday around 6:30 p.m. Although he hung around the shelter, he was listed as homeless.

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Suspect Brandon Simosa was pictured in still images from surveillance video released by the NYPD. (NYPD)

Simosa faces charges of sexually motivated robbery, sexually motivated theft, grand larceny, five counts of possession of stolen property, two counts of petit larceny and drug charges, according to the NYPD.

The Row and other New York City haunts have been identified as Tren de Aragua hot spots, and police have previously blamed the gang for an increase in robberies targeting women with purses or cellphones, describing it as “migrant crime wave.”

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Bragg is the controversial far-left Democrat whose office prosecuted President-elect Donald Trump and is currently trying to convict a Marine veteran who intervened during a violent manslaughter spree by a schizophrenic man.