South Boston murder suspect had been convicted of robbing downtown Boston bank

On a sunny morning in late August, a man wearing a beige scally cap walked up to a teller at the Citizens Bank branch on Summer Street in Downtown Crossing and ordered the bank employee to listen carefully, authorities said.

“If you don’t give me one thousand dollars, I’ll start shooting people,’’ the man said, as he ordered the teller to count out the money in front of him — six $100 bills and $400 in $50 bills.

No weapon was shown, and no dye pack was included in the small wad of cash the man carried out the doors on Aug. 28, 2014. The suspect remained at large until June 30, 2016, when he returned to the same bank and threatened to shoot everyone if he was not given $5,000.

The man who robbed the same bank twice in two years was Bampumim Teixeira — the man who is now facing murder charges for the brutal killing of two doctors inside their South Boston penthouse condo this weekend.

According to Suffolk Assistant District Attorney John Pappas, Teixeira told Boston police that a second man was inside the South Boston condo and was ready to shoot them, which would be similar to threats he made during the bank robberies.

“5,000 [dollars] or I’ll shoot you and everybody here now,’’ Teixeira told the teller during the 2016 robbery, according to records on file at Boston Municipal Court, where he pleaded guilty to both robberies.

He made away with just $221 in the second robbery and later admitted to detectives he committed the robberies and knew his photo had been posted to the massmostwanted.org website, where police post surveillance photos of robbery and shoplifting suspects.

Teixeira was sentenced to serve nine months in the Suffolk County House of Correction last year, a sentence he completed earlier this year, according to records.

According to Boston police records filed in the bank robbery case, officers used MBTA Transit Police surveillance images, bank security camera images, and Teixeira’s Charlie Card records to link him to the Broadway Red Line station in South Boston.

The station is located across the street from the condo complex where the doctors were murdered. Last June, a detective showed a person at the Court Square Press condominium surveillance photographs, and they identified that person as the former co-worker they knew as JJ.

“An individual sitting at the front desk . . . identified the person as “JJ” and that he previously worked [there] and believed he lived in Chelsea,’’ police wrote.

The co-worker told police to contact Palladion Security, where company vice president Paul Chicarello pulled a file from the company’s records and identified the person in the photos as “JJ,” the police report said.

“Mr Chicarello observed the MBTA surveillance photo and advised that he knew the person and obtained a file from the office cabinet,’’ police wrote.

JJ, who turned out to be Teixeira, was later tracked down by police and arrested on the robbery charge in July.

Chicarello told the Globe this weekend that he did not know Teixeira when he was asked about the suspect’s work history.

Teixeira was ordered held without bail Monday following his arraignment for the two murder charges now pending in South Boston Municipal Court.