they don't think she's implicating him in the shootings though. they think she was concerned for him. this will unfold interestingly.
ahh but the observation hatch might have a recording
yup. i'm guessing ecko and locke, maybe others, return to the tv hatch and watch the video of the shooting AFTER michael leads some main characters into a trap. and it'll be too late.
But where would the recordings be? Locke and Echo won't find it for some time. Because it's not in that hatch. It's in another hatch.