ABC News October 26, 2018

DC mansion murders: A look at the evidence that helped convict the killer

WATCH: A $3.5 million mansion, a beautiful family's future up in flames: Part 1

ABC News has obtained police evidence photos and video, some of which is being made public for the first time, used to help convict the man accused in the brutal 2015 murder of three family members and their housekeeper in a Washington, D.C., mansion.

Amy and Savvas Savopoulos, their son Philip, and housekeeper Veralicia Figueroa were killed in May 2015 in the family's multimillion-dollar home in an elite neighborhood in the nation's capital.

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Savvas and Amy Savopoulos are shown in this photo posted to Amy Savapoulos' Facebook.

The four were found in the home after it had been set on fire. Savvas, Amy and Philip Savopoulos were pronounced dead at the scene. Figueroa was given CPR and transported to a local hospital, where she was later pronounced dead.

Daron Wint was convicted on charges of murder, kidnapping, burglary, extortion, arson and theft Thursday. He had pleaded not guilty to all charges.

Metropolitan Police Department
Daron Wint is seen in this undated booking photo.

Wint was on trial for seven weeks for the home invasion and brutal killings. During the trial, his defense team claimed that his brothers had committed the murders while he unknowingly remained downstairs. Wint's brother Darrell Wint testified against him and provided an alibi for the timeframe of the crime. He has not been charged in the case.

(MORE: Suspect in 2015 quadruple murder in Washington, DC mansion convicted of 20 counts, including murder, kidnapping)

ABC News obtained evidence photos from inside the Savopouloses' mansion, surveillance video of Wint, a 911 call made the day of the house fire and other pieces of evidence presented during Wint's trial.

Beginning on May 13, 2015, the victims were held captive overnight as the adults were bound to chairs, beaten with a baseball bat and strangled. An autopsy found that the couple's 10-year-old son, Philip, had been killed by "thermal and sharp-force injuries." He was found in his bedroom.

U.S. Dept. of Justice
Investigators said the Savopoulos' family home in Washington, D.C., was set on fire.
U.S. Dept. of Justice
Amy Savopoulos’ Porsche was found burning in a church parking lot in neighboring Prince George's County, Maryland, on the afternoon of the murders.
(MORE: DC mansion murder housekeeper adds new details to mysterious timeline)

Investigators said the fire in the home had been started in Philip’s bedroom. Amy Savopoulos’ Porsche was found burning in a church parking lot in neighboring Prince George's County, Maryland, the same afternoon as the bodies were discovered.

Wint was tied to the scene after investigators found DNA evidence off a half-eaten pizza found in the home. After a nationwide manhunt, police found him on May 20, 2015, stopping his car near the Maryland-D.C. border. In it, they found "a large stack of what appeared to be $100 bills" and money orders, according to court documents.

U.S. Dept. of Justice
Crime scene photos a pizza box investigators found inside the Savopoulos' Washington, D.C., home.
U.S. Dept. of Justice
On May 14, 2015, police said the victims were held captive overnight as the adults were bound to chairs, beaten with a baseball bat and strangled.
(MORE: DC mansion murders: What cops found in the car suspect was traveling in)

Savvas Savopoulos' assistant Jordan Wallace testified that his boss had left him a voicemail the night before the murders, asking him to go to Savopoulos’ office the following morning for a package.

Among the evidence obtained by ABC News is a surveillance video showing Wallace and Savopoulos’ colleague in a bank the next morning, May 14, 2015, as the colleague withdraws a large amount of money. Wallace says that per Savopoulos’ instructions, he then drove to the family’s home and left a package containing $40,000 on the seat of one of the cars parked in the family's garage.

U.S. Dept. of Justice
Amy, Savvas and Philip Savopoulos, and their housekeeper, Veralicia Figuero, were brutally killed in May 2015 inside the family's Washington, D.C., home.
U.S. Dept. of Justice
Crime scene photo shows one of the burned out rooms inside the Savopoulos' Washington, D.C., home.

Evidence photos include images of the box that held the pizza tied to Wint, a baseball bat with what appeared to be blood located in the bedroom where three of the victims were found, the remains of Amy Savopoulos’ car and the mansion after the fire had been extinguished.

(MORE: DC mansion murders: Inside the search and arrest of suspect Daron Wint)

Prosecutors insist Wint acted alone. Wint’s sentencing hearing has been scheduled for February.

U.S. Dept. of Justice
Crime scene photo shows a hallway inside the Savopoulos' Washington, D.C., home.
U.S. Dept. of Justice
Daron Wint was convicted of charges of murder, kidnapping, burglary, extortion, arson and theft.