Pc Adrian Daly, 46, is alleged to have punched and kicked Jonathan Spencer while he was handcuffed and naked apart from a duvet.
The officer believed Mr Spencer had lied about the occupants of the apartment during the 5am raid.
Daly, of Tower Hamlets, denies assault occasioning actual bodily harm in 2015.
Mr Spencer, his girlfriend Daniella, and a flatmate called Natalie came out with their arms raised when police forced their way in searching for a murder suspect.
source: https://www.standard.co.uk/news/crime/met-police-firearms-officer-beat-up-innocent-man-during-raid-at-flat-a3638206.html
Related:
SHOCKING!!

The Independent Police Complaints Commission (IPCC) said the officer had been placed on restricted duties, meaning he has been removed from work that involves contact with the public.
Mr Charles' family said they were ""disappointed" with the decision.
In a statement, the family said:
"This decision sends completely the wrong message about how seriously the Metropolitan Police take what happened to Rashan and we call on them to reconsider. "We are disappointed and concerned that the simple reality of what is seen in the recording has not been translated into prompt and effective action by the police, CPS and IPCC: to suspend this officer and to investigate him as a suspect in possible criminal offences, as well as for gross misconduct.
"We will continue to press for this."

Mr Martin said he fully understood the strength of public feeling about "the tragic death".
"I have carefully considered the IPCC's representations and the views of key partners in making my decision", he said.
"The officer concerned will be office-based and have no direct contact with any member of the public whilst the investigation is ongoing.
"As always, the serving of a notice by the IPCC does not mean that misconduct has been proven against an officer."

The package was later revealed to contain a mixture of caffeine and paracetamol.
The 20-year-old's death led to angry clashes in Hackney with protesters throwing fireworks and bottles at riot police.
A full inquest into Mr Charles' death is expected to be held in front of a jury next June.
source: http://www.bbc.co.uk/news/uk-england-london-41334902
more:
OUTRAGEOUS!!
“BRITAIN FIRST” LEADER + DEPUTY LEADER RETURN TO THE KENT POLICE STATION TOMORROW TO LEARN IF THEY ARE TO BE PROSECUTED FOR EXPOSING A MIGRANT RAPE GANG – VIDEO
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THE RESULT? -
On Sep 20, 2017 4:15 PM, "Britain First" <emails@britainfirst.org> wrote:
Jayda has four charges and I have three charges.
You literally couldn't make it up!
Needless to say, we are launching an immediate challenge to these ridiculous and restrictive bail conditions - hold tight for more updates on that one!
Can me and Jayda depend on you my friend?
Paul Golding
Leader, Britain First