Metro Police officers arrived at a southwest valley construction site early Wednesday to find the body of a security guard who had earlier been reported missing by his employer.

Bill Moore woke up at 5 a.m., as he always did, and gave his companion, Jean Main, a kiss goodbye when he left for work a few hours later.

As the Chicago Police Department prepares to release a potentially explosive video that shows an officer killing a 17-year-old black teenager named Laquan McDonald, some police-transparency activists have taken a new and curious position: They want the video to remain secret.