Why do you think Jeremy lied? He could have been telling the truth its a possibility that he was.
I think saying that Sheila could not handle a gun is an insult to her intelligence. She was a bright, beautiful 5ft 7 woman. Sheila lived on a farm where guns were probably used everyday of her life that she lived there. Are you saying that Sheila never accompanied her father during the day when he had a gun? NB held shoots at the farm.
To use a gun is not rocket science.
OK Colin said that Sheila did not like guns and would not let the children play with guns. The latter not being the case because a toy gun was found at the farm in the living room.
I find it impossible to except that she could not use a rifle or gun. If I was to give my daughter a rifle and some ammunition and asked her to load the rifle and shoot at a target, I would feel very confident that she would be able to do it.
When I used my fathers rifle I did not go on a course to learn how to use it. It became natural to me, to pick the rifle up. load it and use it.
All I am saying is that it is possible that she could use a gun, its not beyond possibility.

Jeremy put in his written statement and admitted in court he never saw Sheila fire a gun and to his knowledge had not done so.
That means he lied when he told police at the scene that he taught her how to operate the murder weapon and that she had fired it with him and all other guns in the house.
To say he never knew her to fire any weapons and to say he taughter her and she used them all are mutually exclusive claims.
He also clearly lied about taking the gun out to shoot rabbits and leaving it out. To support such made up tale he staged bullets by the phone. Too many bullets though so he ended up revelaing they were staged. His claim the gun had no moderaor when he left it out also betrays it was false because the gun was used with the moderator attached and there is no way Sheila went to the closet just to get th emoderator let alone took it off to put away after killing everyone. It quite clearly was used to kill her as well though which is why no blood was in the rifle muzzle though she suffered a contact wound. The moderator was attached so her blood went in there instead of the muzzle of the rifle.
You and others are too biased to face facts. You make excuses for Jeremy becaus eof your bias and those excuses are not based on any evidence just bias.
You are too biased to face that just because someone keeps guns around a house doesn't mean everyone int he house knows how to use them. You have to be instructed to know how to use them. There is no guarantee you will see someone operate a gun just because they are kept and seeing someone use it from a distance is not the same thing as being instucted by any measure.
Time and time again you ignore that they did not own semi-autos while Sheila was living on the farm. The first semi-auto the family owned was not purchased until the end of 1984. It was not owned very long before the murders occurred and aside from Anthony using it during his visit to try it out, there is no evidence of anyone else using it except Jeremy when he used it a couple of times for target practice. Nevill was no longer interested in target shooting at the time the gun was purchased he purchased it for Jeremy. Nevill used 410s to shoot vermin there is no evidence he ever used it to shoot them. Anthony said the gun looked ot be in brand new condition. That is because apart from Jeremy trying to become a good shot with it through some target practice sessions it wasn't used.
Sheila would have no way to know she needed to chamber a round manually let alone how to do so. Even if she managed to figure out how to insert the magazine she would have then pulled the trigger heard a click but it owuld not have fired.
Squeaky Fromme was around guns all her life too but not semi-autos and she didn't know she needed to manully chamber a round first so she pulled the trigger and nothing happened when she tried to kill US President Ford.
"As Ford drew near, Fromme pulled a .45-caliber semiautomatic pistol, aimed it at the president and pulled the trigger. Witnesses nearby heard the "click" of the hammer dropping. Secret Service agents later found that the pistol had four rounds in its magazine, but the chamber was empty.
Agents swarmed Fromme and wrestled the weapon from her hand as she shouted, "Don't get excited! It didn't go off! It didn't go off!"
http://www.sfgate.com/nation/article/Would-be-assassin-Squeaky-Fromme-is-paroled-3221893.phpYou want so badly to believe that Sheila did it instead of Jeremy that you are willing to ignore evidence and common sense in order to believe what you want to instead of what the evidence and logic dictate.