The bolt handle (this being the proper term) looks like it's been rotated up and the bolt pulled back a centimeter or two, so that the handle is partially in the slot cut through the top of the receiver bridge. This could have happened because someone fired a shot and pushed the bolt forwards to reload for the next one, but decided that one more shot wasn't needed and didn't finish closing the bolt. Or it could be that Day (or some other DPD member) rotated the handle and partially extracted the bolt in order to make the rifle safe to handle before anyone picked it up. Which would be proper procedure. I'm sure there are a few other scenarios that would explain the bolt handle's position as well. You don't have to go by Walt's flights of fancy.
Just to deal with a couple of points here Mitch.
When the rifle is discovered it appears from multiple testimonies that there are orders not to touch the rifle until Day has taken pictures of it in situ. Day is the first person to actually handle the rifle (so we can discard the notion someone other than Day moved the bolt handle before it was removed from it's hiding place).
Day has this to say about removing the rifle:
Captain Fritz was present. After we got the photographs I asked him if he was ready for me to pick it up, and he said, yes. I picked the gun up by the wooden stock. I noted that the stock was too rough apparently to take fingerprints, so I picked it up, and Captain Fritz opened the bolt as I held the gun. A live round fell to the floor.So Fritz is the first person to touch the bolt handle after it is removed from it's hiding place and this is what the Alyea footage appears to show.
This is the bit I'm trying to understand. Am I correct in assuming the following:
To insert the clip into the rifle the bolt handle is pulled backwards and the clip is inserted from the top.
The bolt grip is then pushed forward to load the top bullet into the chamber[?]
After firing the first bullet the bolt handle is pulled backwards, the next bullet in the clip is forced upwards, the bolt handle is pushed forward forcing this next bullet into the chamber.
So the situation we see in the Alyea footage is that the third bullet has been supposedly fired, the bolt handle has been pulled back, the fourth bullet in the clip has been forced upwards but has not been pushed into the chamber.
In this scenario how does Fritz eject this live round?