Page last updated at 15:03 GMT, Friday, 24 July 2009 16:03 UK

Banker sexually assaulted woman

An investment consultant has been found guilty of sexually assaulting a "comatose" woman in an office.

The woman, who cannot be named, was left to sleep in the office alone after drinking heavily at a party.

Colleagues subsequently found Justin von Tunzelman in the room, where he had stripped her and undressed himself.

Von Tunzelman, 38, from Catford, south-east London, was found guilty of sexual assault. He will be sentenced at Southwark Crown Court in September.

The court heard the woman got drunk at a cocktail party with work colleagues last July.

We cannot say what was being done to her. She cannot say either as she was unconscious
Lesley Jones, prosecuting

Later they took her back to their office and left her to sleep in a chair in a side room.

Prosecuting, Lesley Jones said within minutes von Tunzelman went into the room when no-one was looking.

One of her colleagues later saw him with his arm draped across the unconscious woman's shoulder, the court heard.

Despite being told to leave, von Tunzelman ignored the order was later found undressed in the room and the woman had been stripped.

Miss Jones said it was clear that von Tunzelman had "been doing something of a sexual nature".

"We cannot say what was being done to her," Miss Jones said.

"She cannot say either as she was unconscious."

Custody warning

The woman, who gave evidence from behind a screen, said she had no recollection of the incident.

Von Tunzelman said he experienced a memory blackout after drinking a number of pints of lager.

He was found guilty of one count of sexual assault and cleared of a second count against the woman.

The case was adjourned until 16 September for a pre-sentence report.

Judge Stephen Robbins said: "I want him to be under no illusion - he faces the possibility of a custodial sentence."



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