While Marco is formally interviewing John about Danny's Murder, Marco tells John that they all know that Wayne Lowry didn't pull the trigger. Danny died of drowning not a gun wound.
At 10:49, John approached the log, which is visibly in the water. Seconds later, the tide dropped significantly and the log is no longer in the water.
About 42 minutes in, Jane and her dad John are talking in his office. Marco comes by to talk to John. When Marco walks into the office, he leaves the door partially open and sits down. However, when he gets up to leave, you can see that the office door is completely closed.