Media playback is unsupported on your device Media caption The BBC's Daniel Sandford reports on the crimes of Stephen Port, "a serial rapist who became a serial killer"

A serial killer has been found guilty of murdering four young men by poisoning them with lethal doses of a date rape drug. Scotland Yard faces allegations it missed opportunities to stop Port, who was found guilty of a total of 22 offences against 11 men including the four murders, four rapes, 10 counts of administering a substance and four sex assaults. 'You don't have chemsex by yourself'

Prosecutors said Port targeted victims on Grindr and other gay dating sites and apps, then plied them with drinks laced with fatal amounts of the drug GHB, or gamma hydroxybutyrate, otherwise known as liquid ecstasy. In his hand, was a suicide note taking the blame for Mr Kovari’s death, saying: “We was having some fun at a mate’s place and I got carried away and gave him another shot of G.”

It added a plea not to “blame the guy I was with last night”. Mr Justice Openshaw gave the jurors a majority direction on the remaining counts and said he would accept a majority of at least 10 to two. Human rights campaigner Peter Tatchell said: “While timely and commendable, this verdict is no compensation for the loss of four young gay men who had their lives, hopes and dreams cut short.”

He accused the police of “class, gender and sexuality bias” and said lives would have been saved if police had acted on concerns sooner. The murders

Image copyright Met Police Image caption Anthony Walgate (left) and Gabriel Kovari were Port's first victims

Anthony Walgate occasionally worked as a male escort and met Port when he offered the 23-year-old student £800 for an overnight date. He’s not just taken Jack’s life, he’s ruined all of our lives.”

Despite coming to the police’s attention after the death of student Anthony Walgate, 23, in June 2014, Port remained free to kill artist Gabriel Kovari, 22, chef Daniel Whitworth, 21, and forklift driver Jack. Image copyright Stephen Port/Met Police Image caption Port presented a very different version of himself online (left) where he claimed he'd been in the navy and graduated from Oxford University

Between August 2014 and September 2015, Port murdered Gabriel Kovari, 22, from Lewisham, Daniel Whitworth, 21, from Gravesend, Kent, and Jack Taylor, 25, from Dagenham, east London.
Serial killer Stephen Port is found guilty of four rape-murders.