The family of former Welsh Assembly member Carl Sargeant has released correspondence indicating he was facing allegations of "unwanted attention, inappropriate touching or groping" at the time of his death.
The family confirmed the Labour politician was unaware of the exact details of the allegations at the time of his death, and said his distress at being unable to defend himself properly meant he was not afforded "common courtesy, decency or natural justice".
Mr Sargeant is understood to have taken his own life four days after being sacked from his role as communities and children secretary in the Welsh Government.
In a letter and email sent to the Labour Party on Monday, Mr Sargeant's solicitor Huw Bowden made clear that the Alyn & Deeside AM "categorically denied" any wrongdoing and appealed to the party to provide details of the accusations against him.
He noted the party had confirmed that no "parallel investigations" - such as a police inquiry - were being conducted.
Writing the day before the 49-year-old's death, Mr Bowden warned that the case was causing Mr Sargeant anxiety and distress and that any delays in concluding the party's investigation would be "prejudicial ... to his physical and mental well-being".
Mr Bowden complained that broadcast interviews by Carwyn Jones, in which the Welsh First Minister said he had been informed of "a number of incidents" relating to Mr Sargeant's behaviour with women, were prejudicing the inquiry.
A family spokesman said: "Up to the point of his tragic death on Tuesday morning Carl was not informed of any of the detail of the allegations against him, despite requests and warnings regarding his mental welfare.
"The correspondence also discloses the solicitor's concern that media appearances by the First Minister on Monday were prejudicing the inquiry.
"The family wish to disclose the fact that Carl maintained his innocence and he categorically denied any wrongdoing. The distress of not being able to defend himself properly against these unspecified allegations meant he was not afforded common courtesy, decency or natural justice."