This is the moment future triple killer Valdo Calocane was stopped by police after begging MI5 to be arrested.

Bodycam footage from Met Police officers called to security service headquarters in central London in May 2021 showed mentally ill Calocane appearing ‘calm and compliant’ when stopped by the two officers.

An inquiry is looking into mistakes made in the run-up to Calocane being free to kill three people and seriously injure three others in a rampage in Nottingham in June 2023.

Footage played to the inquiry today showed bearded Calocane standing outside Thames House in Millbank wearing all black, despite it being a ‘hot’ day.

The inquiry heard Calocane arrived at around 5pm on May 31, a bank holiday, and pressed the intercom.

The head of physical security at MI5, who was referred to only as ‘Witness G’, spoke to Calocane who was ‘claiming to have information regarding a case’.

The witness said Calocane ‘wanted to be arrested but would not give any more information’, and so police were called.

Bodyworn footage recorded by Pc Graham Foster showed him and a colleague approaching bearded Calocane, standing in the shade, as families with children and pushing prams walked past.

During the brief exchange, Pc Foster asked Calocane to take his hands out of his pockets and provide his name, which was checked against police records.

Asked if he had been arrested before, Calocane replied: ‘Not really.’ He then said: ‘I have been arrested once’.

The inquiry previously heard he had been arrested twice in one 24-hour period a year earlier for banging down two neighbours’ front doors in Nottingham where he was a student, though police took no further action.

The inquiry heard a police operator who carried out checks into the suspect stated that Calocane ‘was known but not wanted and had no warning signals’.

Calocane left the scene moments later when his Uber arrived – although police did not ask where he was going.

Pc Foster said he did not probe Calocane about why he was there because he was ‘trying to build a rapport’, and because Calocane had made plans to leave the area.

Pc Foster told the inquiry: ‘I was content with the response that he gave.

‘I was content by his demeanor, his mannerism, he didn’t seem agitated, he was calm, compliant, coherent, so I was happy with the response he gave me.’

Sophie Cartwright KC, representing the survivors of Calocane’s rampage, said: ‘Why didnt you ask VC (Calocane) a question about why he wanted to be arrested?

‘This is a member of the public who has attended the home of MI5. It is significant, would you agree, that a member of the public is asking to be arrested at MI5?’

Pc Foster replied: ‘The reason I was there, again, trying to build a rapport with a member of the public and to ascertain did he want to speak to the police and he replied clearly that he didn’t want to speak to police.

‘There wasn’t anything that he wished to tell us about, so I was happy with the response he gave me.’

The inquiry also heard from one of Calocane’s former flatmates who told police he was stalked by the violent thug.

The witness, known only as Sebastian, said he had to move out of their flatshare after Valocane threatened him and then tried to enter his locked room in the middle of the night.

He also reported being frightened when Calocane followed him home from the gym on multiple occasions.

But police did not consider the matter amounted to stalking and the complaint went no further.

Calocane went on to kill 19-year-olds Barnaby Webber and Grace O’Malley-Kumar, and 65-year-old Ian Coates during a stabbing spree in 2023.

He was handed an indefinite hospital order after admitting manslaughter on the grounds of diminished responsibility.

The inquiry continues.