Brian Kiplagat, a Kenyan man accused of murdering his girlfriend, Marianne Nduta Kilonzi, in the United Kingdom before fleeing to Kenya, has been detained at the Namanga border and is awaiting extradition to London.
The case stems from the death of Marianne Kilonzi, a 43-year-old Kenyan national and senior banking executive at CitiBank, whose body was discovered in her South London apartment on January 17, 2025.
According to the London Metropolitan Police Service, Kilonzi was found with a serious head injury, prompting a homicide investigation.
Authorities became concerned after she failed to report to work, an unusual occurrence for the respected professional who had spent 18 years building a successful career and had risen to the position of Vice President of Trade and Working Capital Sales at the leading international bank.
Residents of the Royal Arsenal Riverside development on Argyll Road in Woolwich reported hearing loud disturbances coming from Kilonzi’s first-floor apartment between 3 a.m. and 4 a.m. on the night of the incident.
Following months of investigation, authorities tracked down Kiplagat, who is now in custody at the Kenya-Tanzania border crossing in Namanga.
He is expected to face extradition proceedings to return to the United Kingdom, where he will answer to the allegations surrounding Kilonzi’s death.
