Kathleen Folbigg: Notorious serial killer savagely bashed after moving prisons 7 Mar, 2021 11:32 PM 7 minutes to read Folbigg with her baby daughter Sarah. Photo / News Ltd news.com.au By: Ben Graham One of Australia's most notorious serial killers, Kathleen Folbigg, has been brutally bashed by an inmate after being transferred to a new prison in northern NSW. It's been revealed that the attack on New Year's Eve left Folbigg — convicted of killing four of her infant children — with a black eye and bruises, and her friends, who are protesting her innocence, fearing for her life. The attack was detailed in a letter from Folbigg, seen by The Australian.