Who is in charge of the investigation? The local city Sheriff?
Not the FBI? Not the Nevada State police? Not some local police chief?
How many investigations are there? Sheriff? State? FBI? Other federal?
When the Sheriff speaks, does he speak for all investigations?
The Clark County Sheriff IS the Police Chief.
He is in charge of the Las Vegas Metro Police Department, which covers all of Clark County.
It's kind of a different way of doing things, but that's how it works in Clark County, NV.
There are 16 sheriff's departments in Nevada, and two of them are unique, as the Carson City Sheriff's Office is a result of the 1967 merger of the old Carson City Police Department and the Ormsby County Sheriff's Department, as well as the Las Vegas Metropolitan Police Department which is the result of the 1973 merger of the Clark County Sheriff's Office and the old Las Vegas Police Department.