Autonomy founder and former chief executive Mike Lynch has launched a scathing attack on HP the week after the US tech giant claimed the firm had falsified its accounts to inflate its worth.
HP's claims led the firm to take an $8.8bn write down on the acquisition of the UK firm after a whistle-blower raised concerns over deals made by Autonomy.
HP said it would take all necessary action to recover whatever lost finances it could.
Lynch strongly denied these accusations when they first came to light and in an open letter released on Tuesday called on the HP board to be more transparent regarding the specifics around the allegations.
"It was shocking that HP put non-specific but highly damaging allegations into the public domain without prior notification or contact with me, as former chief executive of Autonomy," he said.
"Having no details beyond the limited public information provided last week, and still with no further contact from you, I am writing today to ask you, the board of HP, for immediate and specific explanations for the allegations HP is making."
Lynch added that HP should provide him with "the interim report and any other documents" which the firm is said to have provided to the SEC and UK Serious Fraud Office rather than relying on gathering information second hand via the media.
He also outlined a number of key points he wants HP to clarify, including:
Lynch ended by voicing his despair with the way the acquisition of his firm has turned out.
"Autonomy joined forces with HP with real hopes for the future and in the belief that together there was an opportunity to make HP great again," he said.
"I have been truly saddened by the events of the past months, and am shocked and appalled by the events of the past week."
Dan Worth is the news editor for V3 having first joined the site as a reporter in November 2009. He specialises in a raft of areas including fixed and mobile telecoms, data protection, social media and government IT. Before joining V3 Dan covered communications technology, data handling and resilience in the emergency services sector on the BAPCO Journal.