Feartopia

A spate of mysterious deaths in a small town lead locals to believe a serial killer is on the loose. As they investigate, several more deaths occur – including investigators dying in unusual circumstances. The catch is that there is no serial killer – the deaths are all just coincidence. Some are caused by investigators taking risks to try to solve the mystery. They will come up with a suspect, but then he (she?) will be the next to die – and the deaths will continue.

Someone with a skeleton in the closet decides to bury it, and use the “serial killer” as cover. Gets caught, actually kills the person who catches him, worries about becoming an actual serial killer, but gets killed himself while covering it up.