When Kate and Gibbs break into Petty Officer Smith's bedroom, the door hits a table and knocks over a picture. When they leave the room and come back in, the picture is standing on the table.
Abby states that 15mg of Trazadone would be enough to zonk her out for most of the day, the starting dose is sometimes as low as 50mg. 15mg would not zonk her out at all.
Gibbs says that the victim lived in Georgetown, which is an old, urban, upscale, expensive, densely populated area in Washington, DC. First, it's highly unlike that a young petty officer would live in Georgetown or could afford to do so. Second, the fictional home in question is a modern, contemporary single-family ranch house with a five-digit street number and a grassy lawn in a woodsy neighborhood with a curved street with little traffic and few pedestrians.
Both Tony and Kate question the fact that Fornell is alive. However they already knew that because at the end of "The Bone Yard" Tony, Kate and McGee see Fornell walk out of the squad room.