Caroline Flack was found "naked and covered in blood" by police on the night she was arrested on suspicion of assaulting her boyfriend Lewis Burton last year.
The Love Island host, 40, was found hanged at her Stoke Newington, North London, home on February 15 this year.
An inquest into her death resumed at Poplar Coroner’s Court in London this morning for a second day before Senior Coroner Mary Hassell, with Caroline's family attending via video link.
Today, Detective Inspector Lauren Bateman, of the Metropolitan Police, resumed giving evidence and a police briefing document was presented to the court.
The paperwork was circulated to officers involved in the case following Caroline's arrest at her home in north east London on December 11 last year.
The document stated: "Ms Flack was naked and covered in blood. She was bleeding from an injury to her left wrist.
"Mr Burton was in boxer shorts. He said he was suddenly woken by her hitting him on the head by the object with some force...
"Ms Flack made numerous admissions to the assault in the presence of officers.
"They included: 'I hit him. He was cheating on me.' At this time it is unclear what object was used to assault Mr Burton.
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"He assumed it was a desk fan or a lamp. Ms Flack's phone has been seized as it had a significant amount of blood on it and a crack in one of the corners suggesting this may have been the weapon.'
Burton told police he did not wish to proceed with a complaint against her. he had suffered a "superficial injury" to his head while Caroline had self-inflicted injuries to her wrist.
The court heard that at the scene, Caroline told officers: "I did it. I whacked him round the head . I admit I did it. I used the phone.
"I had his phone in one hand and mine in the other. I whacked him round the head. There was no excuse for it. I was just upset. I admit I did it.''
But in an interview, DI Bateman said Caroline said she "flicked" Lewis in a bid to wake him up.
She thought she might have dropped the phone on his head. But she did not believe she caused the injury. She did not know how it had happened
Bateman told the court: "It sounded like she was saying it was an accident, not an assault.''
Yesterday, the court heard how the assault case against Caroline was going to be dealt with as a caution until police appealed the prosecutor's decision.
The former Love Island host, 40, took her own life at her flat in Stoke Newington, north-east London on February 15 days after learning her trial over the alleged attack on Burton was going ahead.
She was charged with assault by beating and pleaded not guilty.
Her boyfriend always maintained her innocence, while her family slammed prosecutors for pursuing the case against the star - calling it a "show trial".
She stepped down from hosting Love Island, and in an unpublished Instagram post released by her family after her death Caroline said her "whole world and future was swept from under my feet" after her arrest.
In the aftermath of the tragedy, the Crown Prosecution Service said in a statement: "Our thoughts remain with the family and friends of Caroline Flack.
"It is normal practice for prosecutors to hold a debriefing in complex or sensitive cases after they have ended.
"This has taken place and found that the case was handled appropriately and in line with our published legal guidance."
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