For more than two hours, Bampumim Teixeira lurked outside the Macallen Building in South Boston, waiting for an opportunity to bypass security at the luxury condominium complex and slip inside, a prosecutor told jurors Thursday.
Teixeira had briefly worked as a concierge at the building, and knew a way in.
Shortly before 4 p.m. on May 5, 2017, he followed a car into the garage, then made his way to the 11th-floor penthouse through an unlocked stairway, the prosecutor said.
When Lina Bolaños arrived home about 50 minutes later, signed for two packages at the concierge desk and headed upstairs, Teixeira was waiting, Suffolk Assistant District Attorney John Pappas said in his opening statement in Teixeira’s double-murder trial.
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Police later found the packages strewn outside the door to the penthouse, along with her keys.
Teixeira is accused of murdering Bolaños and her fiance, Richard Field, who arrived at the condominium while Teixeira was still inside. Police found the victims, who were both anesthesiologists, with their hands cuffed behind their backs and their throats slashed.
Boston police shot and wounded Teixeira inside the apartment, Pappas said. They found a duffel bag that he had stuffed with Bolaños’s jewelry and other personal belongings, Pappas said. Police also found knives, pliers, handcuffs, duct tape, and a mask nearby.
“These murders were committed by one person acting alone, one person with a purpose and plan,” Pappas told jurors as he pointed at Teixeira, 33. “Although the why to this story may never fully be explained to your satisfaction, the who will absolutely never be in doubt.”
In his opening statement, Teixeira’s attorney, Steven Sack, told jurors there was no video, audio, or scientific evidence proving his client’s guilt.
“No credible evidence will tell you that Bampumim Teixeira broke into the home of Lina Bolaños and Richard Field and murdered them on May 5, 2017, and that’s because he didn’t,” Sack said.
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Sack said Teixeira was unarmed when he was shot inside the condominium and urged jurors “not to jump to any conclusions like the Boston police did” when they shot Teixeira. Police later found a BB gun in a backpack, Sack said.
Superior Court Judge Mitchell Kaplan, who is presiding over the trial, told the 15 jurors they will be taken to visit the Macallen Building, on Dorchester Avenue, during the trial, which is expected to last about two weeks.
On Thursday, jurors were shown the building’s security footage of Field entering the lobby elevator at 6:38 p.m., shortly before his murder. His brother, Jason, was the first witness to take the stand and fought back tears as he identified his brother in the video.
Shortly after Field arrived home, a series of 911 calls were attempted from his cellphone “that were either abandoned or hung up,” Pappas told jurors. Just after 7:40 p.m., one call went through, but despite her best efforts, the police call-taker “could not make out enough information.”
A few minutes later a text message was sent from Field’s phone to a friend, urging him to call 911 because there was a gunman in the house. Three more texts were sent in rapid succession, and the last one said “serious.”
The friend did not see the messages right away, but once he spotted them he and his girlfriend alerted the building’s concierge desk and the police. The concierge also called 911.
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The first three Boston police officers who arrived saw the packages and keys on the floor outside the condominium. When no one responded to their knock on the door, they used the key to get inside.
They yelled, “Boston police! Make yourself known,” Pappas said. Teixeira emerged “without any warning out of nowhere” and officers thought he was brandishing a gun, Pappas said. One of the officers yelled “gun” and officers fired, wounding Teixeira, Pappas said.
Police found Field in one room “dead in a pool of his own blood” with his hands bound behind his back. In the second bedroom, they found Bolaños, who had been “stabbed repeatedly in the neck,” Pappas said.
He also said that jurors will hear an account Teixeira gave to police after he was arrested.
“You are going to find that statement preposterous at the end of this trial, how it makes no sense compared to all of the other evidence in this case,” he said.
The courtroom was filled with friends and relatives of Field and Bolaños. Bolaños’s mother, who flew in from Spain for the trial, was seated in the front row of the gallery along with Field’s mother, brother, sister, and other family.
Field, 49, worked at North Shore Pain Management, a Beverly business he helped create, and was certified in interventional pain management and anesthesiology. Bolaños, 38, a native of Colombia, was a pediatric anesthesiologist at Massachusetts Eye and Ear and an anesthesia instructor at Harvard Medical School.
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Teixeira, who was born in Guinea-Bissau, a small country in West Africa, came to the United States in 2010 and obtained a green card. He worked at the Macallen Building for several weeks in 2016 while employed by Palladion Services, which provided concierge services at the property until another company took over in February 2017.
In July 2016, Teixeira, who was unemployed at the time and living in a Chelsea rooming house, was arrested for robbing a Citizens Bank in Downtown Crossing. He immediately admitted to the robbery and told police he had robbed the same bank two years earlier.
During both robberies, Teixeira threatened to shoot people if the teller didn’t give him money, but didn’t show a gun. He was sentenced to nine months in jail and was released the month before allegedly killing the doctors.
Shelley Murphy can be reached at shelley.murphy@globe.com. Follow her on Twitter @shelleymurph.