Kevin Garry Crump was born in 1949 in Australia. Details about his early life are limited, but it is known that he had a history of criminal activity, including offenses like breaking and entering. He met Allan Baker while serving a sentence for such crimes. After their release, they reunited and decided to embark on a life of crime together.​

On 3 November 1973, Crump and Baker murdered Ian James Lamb, a 43-year-old man sleeping in his car near Narrabri, New South Wales. They shot him with a .308 rifle, stole his belongings, and moved his car.​

Three days later, they abducted 34-year-old Virginia Morse from her home in Collarenebri, New South Wales. Over several days, they drove her towards Queensland, repeatedly raping and torturing her. On 7 November, near the Weir River, they tied her to a tree, continued the assaults, and then shot her between the eyes with a .222 rifle. They disposed of her body in the river and burned her clothes.​

On 13 November, their stolen vehicle was spotted near Maitland, leading to a high-speed chase. They shot and seriously wounded a police officer before being apprehended after a manhunt.​

In 1974, Crump was convicted of murder and conspiracy to murder, receiving life sentences. Justice Taylor recommended that he never be released, stating, "You have outraged all accepted standards of the behaviour of men... I believe that you should spend the rest of your lives in jail and there you should die."​

Crump's sentence was later reviewed, setting a non-parole period of 30 years, but subsequent laws prevented his release. He died in prison on 23 November 2023 at the age of 74.