Two Brockton brothers are accused of simulating a bank robbery scenario Tuesday as an excuse for the one who worked in the Boston bank to take $200,000 from the vault.

“We’ve seen time and time again employees hatching what they think is a clever plan to steal from their workplace, and then we see those supposedly clever plans unravel, usually very quickly,” Suffolk District Attorney Kevin Hayden said. “The immediate suspicions of the bank officers and some extremely effective work by the investigative agencies involved led to these brothers answering to these charges in court today.”

Justin, 32, and Jenel Flounoury, 28, were arraigned in municipal court in West Roxbury on charges of larceny and conspiracy connected to their alleged scheme to pocket $197,146 in cash from Energy Credit Union, where Jenel Flounoury worked as a teller.

Judge John Garland ordered each of them held on $20,000 bail and scheduled pre-trial hearings for Oct. 30. Should they post bail, both must stay away from the credit union.

A little before 1 p.m. on Tuesday, Boston police and members of the FBI Violent Crimes Task Force responded to a report of a robbery in progress at the credit union at 156 Spring St.

According to a DA statement, Jenel Flounoury told police that just minutes before, an unknown male — who prosecutors say is actually his brother — walked up to his teller window with a note demanding that he “hand it over.” The teller then turn around and went into the main vault and put all the cash into a blue ATM bag and did as the note told him. The “unknown male” robber then fled the scene.

But the whole incident seemed highly suspect to the Credit Union’s chief financial officer, who allegedly told police Jenel Flounoury’s actions were not in line with procedures for such situations. Specifically, he hadn’t checked the teller drawer but instead went straight to the vault without being directed to and also handed over more than was demanded. Plus, the teller had previously been let go for violating company procedure and had only been rehired last month.

Based on that information, investigators followed Janel Founoury to his Brockton home where they allegedly saw both brothers burning what appeared to be clothing on a grill. Investigators got a search warrant and raided the home at 1:45 a.m. Wednesday and allegedly found the cash.