Kathleen Folbigg’s husband Craig dies suddenly months after she was released from prison and acquitted of the murder of her four children.

The ex-husband of Kathleen Folbigg, the woman who was wrongly jailed for killing the couple’s four children, has died of a heart attack.

Craig Folbigg, who also suffered from cancer, is believed to have been taken to Maitland Hospital in New South Wales’ Hunter Valley on Saturday and died on Monday.

Folbigg was convicted of three counts of murder and one count of manslaughter in 2003 after her babies Patrick, Sarah, Laura and Caleb died between 1989 and 1999.

She was recently released due to “reasonable doubt” about the cause of her children’s deaths.