Matthew Christopher Flores Semyonov Wanted for Parents' Murders in Arizona as Federal Authorities Search Internationally

 

Matthew Christopher Flores Semyonov Wanted for the Murders of His Parents in Arizona, Believed to Have Fled the Country

Matthew Christopher Flores Semyonov, 27, is wanted by federal and local authorities in connection with the murders of his parents in Litchfield Park, Arizona.

On August 5, 2026, Avondale police conducted a welfare check at the family's home.

Inside, investigators discovered Hector Flores and Larissa “Lessi” Flores dead.

Both had suffered blunt-force injuries and had been stabbed.

Authorities believe the killings occurred before the bodies were discovered.

Investigators identified the couple's son, Matthew, as the primary suspect.

But by then, he was gone.

According to the U.S. Marshals Service, Semyonov is believed to have fled the United States shortly after the murders. Federal authorities are working with international law enforcement agencies to locate him.

He is wanted on charges including first-degree murder, domestic violence, abandonment or concealment of a dead body, and unlawful flight to avoid prosecution.

Authorities consider him dangerous and warn the public not to approach him.

Investigators have also cautioned that his appearance may have changed significantly since the photographs released publicly were taken.

Semyonov remains a fugitive, and he has not been convicted.

Anyone with information about his whereabouts can contact the U.S. Marshals Service at 1-877-926-8332.

Hector and Larissa Flores were found murdered inside their own home. Their son is accused of killing them, and authorities believe he fled the country rather than face the charges.

Two people are dead. Their family deserves answers. And the person responsible needs to be held accountable.