Private investigator P Balasubramaniam's widow, A Santamil Selvi, has apologised to Prime Minister Najib Abdul Razak and his family for implying that they had anything to do with her husband's death.

“When my husband passed away, I felt very frustrated. Tension. When people accused (Najib’s wife) Rosmah (Mansor) of killing him, I went along with it.

“Now I realised that, maybe, it was a heart attack. I had misspoken, so I apologise,” she told reporters at a press conference today.

Her husband - also known as PI Bala - had passed away on March 1, 2013 due to a heart attack.

Selvi said that she approached Pertubuhan Minda Sosial dan Prihatin (PMSP) leader Ramesh Rao - who had arranged today's press conference - for help for the sake of her children's education, after an earlier offer of aid from PKR never materialised.

She told reporters that she needed RM20,000 to fund the education of two of her children, one 19 years old, another, 18.

However, things got heated up when a reporter pressured her on why she is seemingly reversing her earlier position - and whether monetary rewards had anything to do with it.

She clarified that her presence today was just to apologise for her emotional outburst over his death and not about anything else, stressing that all her husband said in his earlier statutory declarations (SDs) and videos were true.

"What Bala said was all true. The SDs were true. I apologise to Rosmah because I said that she murdered my husband, (but) Bala's SDs were true.

"I came here today because of my children's education, not the SDs," she reiterated, before storming out of the press conference.