A man who supplied the serial rapist and killer Stephen Port with chemsex drugs has been found guilty of murdering a Bond film actor.

Gerald Matovu, 26, administered a fatal dose of GHB (gamma-hydroxybutyrate) to Eric Michels, 54, at the latter’s home in Chessington, London, after they met on the dating app Grindr in August last year.

The jury at the Old Bailey in London heard that while Michels was either unconscious or dead, Matovu photographed Michels’ bank cards, driving licence and other personal information.

Michels, who had a small role in the 2012 film Skyfall, was one of 12 men targeted by Matovu and his partner Brandon Dunbar, 24, over a 19-month period.

During his trial, the prosecutor Jonathan Rees QC described how the defendants took advantage of hook-ups and dates arranged with men over apps such as Grindr to steal their belongings and bank details.

On Monday, Matovu, from Southwark, south London, was found guilty of murdering Michels.

He was also found guilty of six counts of administering a noxious substance, seven thefts, six counts of having articles for fraud, assault by penetration, assault by occasioning actual bodily harm and possessing GBL (GHB precursor) drugs.

Jurors were not told about his connection with Port – a former chef who also targeted his victims on Grindr and plied them with GHB.

Port was sentenced to life imprisonment in 2016 for the rape and murder of four young men at his home in Barking, east London.

Matovu pleaded guilty to supplying Port with mephedrone and GHB but denied knowing what he planned to do with it. He was sentenced to 12 months community service, 150 hours of unpaid work and 40 days of drug rehabilitation in April 2017.

Michels, an energy company employee and father of three, was divorced from his wife in 2010 after coming out as gay but they remained on good terms.

Before he met Matovu on Grindr on 16 August, Michels had gone out to bars in Soho, central London. Michels invited Matovu to his home for sex, the court heard.

Matovu also stole a MacBook, a mobile phone, a US driving licence, an initialled black case, various cards and a suitcase full of bottles of alcohol from Michels’ home.

Michels’ body was found under a duvet with an empty syringe by concerned family members the following day.

Both his and Matovu’s DNA was found on the syringe, along with traces of GHB, the court heard.

Motavu denied murder and administering GHB to Michels, who he said took the drug of his own free will.

He accepted going home with him to have consensual sex.

Dunbar, from Forest Gate in east London, was found guilty of three counts of administering a noxious substance, five counts of theft, six of having articles for fraud, two counts of fraud, one of assault by penetration, one of assault by occasioning actual bodily harm, and one of dishonestly retaining wrongful credit.

Both defendants have been remanded in custody and will be sentenced on 5 September.

A jury deliberated for 26 hours before reaching guilty verdicts on all the charges against both defendants.

Matovu and Dunbar were convicted of charges including administering a noxious substance, assault by penetration and theft.

• This article was amended on 18 July 2019 to remove a reference to the fatal dose of GHB having been administered by a syringe.