Television presenter Justin Lee Collins used details of his ex-girlfriend's sexual past as a "rock" with which to harm her, a court heard.
Collins, 38, had a seven-month relationship with video games public relations worker Anna Larke, who is accusing him of harassment.
He denies the charge.
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Comedian and television presenter Justin Lee Collins, 38, has been found guilty of harassing his former partner.
A jury has begun its second day of deliberations in the trial of television presenter Justin Lee Collins.
Television presenter Justin Lee Collins's relationship with an ex-girlfriend accusing him of harassment brought out "the demon" in him.