I can't remember now, RB's statements maybe? We discussed this a couple of weeks ago.
From JB's official website:
"Myths: Sheila Caffell didn’t know how to fire a gun"
"Sheila grew up on a farm where there were a number of guns around the house every day. There is absolutely no question that she was familiar with firearms and had been out with shooting parties. Just because she knew how to load and fire a gun does not make her a good shot. The family were all killed at close range, the furthest shot away was 3 feet, she couldn’t have missed.
David Boutflour and Peter Eaton both stated at trial and later in statements that they saw Sheila with a gun."