A shocking murder case in Maryland has finally reached its conclusion after years of legal battles. Sophia Negroponte, the adopted daughter of former U.S. intelligence chief John Negroponte, has been sentenced to 35 years in prison for killing her longtime friend during a drunken argument.
The case, which began with the fatal stabbing of 24-year-old Yousuf Rasmussen in 2020, went through two trials before the final verdict and sentencing were confirmed.
Maryland Woman Sentenced for Friend’s Murder
A Montgomery County judge has sentenced Sophia Negroponte, 33, to 35 years in prison after she was found guilty of second-degree murder.
The sentencing took place in March 2026 in the Montgomery County Circuit Court. Judge Terrence McGann handed down the punishment after a jury convicted her in November 2025.
The case dates back to February 2020, when Negroponte stabbed her longtime friend Yousuf Rasmussen during an argument. The incident happened at an Airbnb property in Rockville, Maryland, a suburb located near Washington, D.C.
Prosecutors said the attack occurred during a night of drinking that ended in violence.
Drunken Argument Turned Deadly
According to court records, Negroponte, Rasmussen, and another friend were drinking together at the Airbnb that evening.
During the night, prosecutors said Negroponte and Rasmussen argued twice. Eventually, Rasmussen decided to leave the house.
However, he realized he had forgotten his phone inside and returned to retrieve it.
At that moment, prosecutors said Negroponte had armed herself with a knife.
When Rasmussen came back inside, the argument escalated into a physical struggle. During the confrontation, Negroponte stabbed him multiple times.
One of the stab wounds cut Rasmussen’s jugular vein, which proved fatal.
Witness Described the Violent Moment
During the trial, prosecutors presented body-camera footage from police officers who responded to the scene.
In the footage, a witness described how the situation quickly turned violent.
The witness told officers that the group had been drinking together before the argument started. He said the dispute involved anger and minor physical fighting before suddenly escalating.
According to the witness, Negroponte grabbed a knife from a drawer and stabbed Rasmussen in the neck while the two were scuffling.
Police later confirmed that Rasmussen died from his injuries.
Case Went Through Two Trials
This case took several years to reach a final conclusion because the legal process happened twice.
Negroponte was first convicted in January 2023 and received the same 35-year sentence in March 2023.
However, in January 2024, an appeals court overturned the conviction.
The court ruled that jurors should not have heard certain statements made by police and an expert witness that questioned Negroponte’s credibility.
The judges explained that these comments suggested investigators believed she was lying. Under legal rules, such opinions about a defendant’s credibility should not be presented to a jury.
Because those statements could have unfairly influenced the verdict, the court ordered a new trial.
Second Trial Led to Same Verdict
In the retrial, prosecutors presented the case again but without the disputed statements.
Despite the changes, the jury once again found Negroponte guilty of second-degree murder.
Prosecutors said the identical verdict from two separate juries confirmed the strength of the evidence.
Montgomery County State’s Attorney John McCarthy said the 35-year sentence was appropriate considering the seriousness of the crime.
Victim’s Family Speaks Out
After the first conviction, Rasmussen’s family released an emotional statement remembering him.
They described Yousuf as a kind and loving person who brought joy to everyone around him.
The family said they will always carry his memory with them and thanked friends and supporters who stood by them during the long legal process.
Their message was shared again after the second conviction.
Background of Sophia Negroponte
Sophia Negroponte is the adopted daughter of former U.S. diplomat and intelligence official John Negroponte.
He was the first Director of National Intelligence in the United States after the position was created following the 9/11 attacks.
Sophia was one of five children adopted by John and his wife, Diana Negroponte, during the 1980s when he served as U.S. ambassador to Honduras.
