Why did the police decide to frame Jeremy a month later ?
Jeremy says it was because Sheila woke up in the kitchen, went upstairs and was shot by the raid team with the 22 rifle, or shot herself.
The raid team for some reason do not want to admit to this as they are embarrassed.
But during the first month, no one was suggesting the raid team shot Sheila or she shot herself after going upstairs. So why not keep to the murder/suicide stance ?