 Manock, when photographing the body, saw what he believed to be four bruises on the left calf of Cheney, caused by what he believed to be a grip mark.When a sample was taken of the thumb bruise and examined for bruising, the result was negative.Despite this, this apparent bruise was used in Manock's proposed theory that Keogh had gripped Cheney's legs to hold her underwater in the bath, drowning her.