A defendant clasped his head in his hands and began to cry silently as he was found guilty of drugging, sexually assaulting and raping a married man who had been on a night out with colleagues.

A jury at Oxford Crown Court took 13 hours and 39 minutes to find Luiz Da Silva Neto, 35, guilty of the assault in December 2021.

They found Da Silva Neto guilty of administering a substance with intent at a property in Oxfordshire, causing a person to engage in sexual activity without consent and rape.

Da Silva Neto, of Wandsworth, south London, has denied drugging two men, who cannot be named for legal reasons, potentially with GHB or GBL and sexually assaulting them in November and December 2021.

Prosecutor Matthew Walsh earlier described the drug as an “aphrodisiac” which has “euphoric and hallucinogenic effects”.

The jury are still considering verdicts on charges relating to the other alleged victim.

The married man who was on a night out with work colleagues in central London hotspot Raffles before he was assaulted at a property in Oxfordshire, the court heard.

He told the trial he has vague memories of events that night.

They included feeling “strange” when he spoke to the doorman at the club, having a cup with a “dark brown liquid” being held to his lips at some point and waking naked in a strange room.

Da Silva Neto said he was “high” and looking for drugs that night but claimed the married man did not seem intoxicated when they met and he denied spiking the man’s drink, the court heard.

The jury found Da Silva Neto not guilty of charges of kidnap and committing an offence with intent to commit a sexual offence in relation to the married man.

The jury had previously also found Da Silva Neto not guilty on one count of administering a substance with intent with regard to the married man in a car at an earlier stage of the night.

They are still considering their verdicts with regard to his first alleged victim who was said to have been assaulted at a house in Middle Barton, Oxfordshire in November 2021.

Da Silva Neto denies charges of administering a substance with intent and causing a person to engage in sexual activity without consent in relation to this first alleged victim.

The jury has been told that this man and Da Silva Neto had shots of Jagermeister before the alleged victim began to feel tired and went to sleep fully clothed before waking up naked.

Da Silva Neto told the court “he was consenting” and “awake” when the pair had intimate contact.

The jury will continue its deliberations on Friday at 10am.