See-n-Solve

"The workmen are all lying," Amy figured. "One of them walked right into Jensen's office this morning and got into a fight."

"Right," Harry agreed. "After the murder, he came running out and asked his coworkers to protect him. That took just a few seconds. The rest they improvised. Some big, dark stranger. Pretty lame."

"The men hated Jensen, that much is clear."

"We probably should have separated them before letting them talk. But it's too late now." Harry turned to his daughter. "So? Any clues?"

"Something's missing that should be here. Look around the floor. You'll see what I mean."