Kidd was also a prolific true crime writer, having published a large number of books about high-profile murder cases across Australia and the world.

[1] His most widely disseminated book, Till Death Do Us Part: True Stories of Australian Marriages That Ended in Murder, is held by 106 WorldCat libraries worldwide.

[6] In 2008, he was diagnosed with bladder cancer;[11] he had a "cardiac episode" in 2018,[12] which prevented him from hosting a cruise with Moore for a group of fans.

[13] Kidd died on 26 December 2021 after a "protracted illness", at the age of 76; his death was announced the following day on 2GB's Twitter account.

[14] Moore described the death as expected due to Kidd's health issues, but nonetheless "a damn shock".