The 33-year-old marketing executive disappeared last Wednesday at 9.30pm during her walk home from a friend’s south London address.
The officer was arrested in Kent on Tuesday evening and remains in custody at a police station, according to the Met.
A woman has also been taken into custody at a London police station on suspicion of assisting an offender.
Metropolitan Police issued a statement confirming details of the arrests.
The statement reads: “This evening, officers arrested a man at an address in Kent in connection with the disappearance of Sarah Everard.
“He has been taken into custody at a London police station where he remains.
“The man is a serving Metropolitan Police officer.”
Detective Chief Inspector Katherine Goodwin stressed that authorities continue to search for Ms Everard and insisted that anyone with any information that could help the investigation should contact the police.
She said: “This is a significant development in our inquiry. This is a fast moving investigation and we are doing everything we can to find Sarah.
“We have seen an overwhelming response from the public and I repeat my request for anyone with information that may be relevant to come forward, no matter how insignificant it may seem.”
Published at Wed, 10 Mar 2021 00:54:00 +0000