It goes on:
The case caused a sensation because Collison wasn't arrested that night. Instead, Sanford officers sat him in the back of a patrol car, watched the video, then allowed him to go home.
Collison is the son of Sanford police Lt. Chris Collison. He was not at the scene that night, but his son phoned him, and Lt. Collison then called Sgt. Anthony Raimondo, who was there.
Patrol officers had decided to arrest Collison, but Raimondo said no.
It isn't entirely clear, but it seems like officers there wanted to arrest him but their boss said no. Their boss also had spoken to the man's father. That certainly looks inappropriate but, even if it happened as it appears from the outside, the Zimmerman case represents a significant jump in misconduct if it's true there has been a coverup. This latest incident would require more people being complicit in the "sweeping under the rug" of a much more serious crime.
I think the fact that in the earlier case the release of the video and public pressure lead to the proper decision being made suggests that even if these officials are attempting to make this go away the facts will ultimately drive the consequences.