How many murders occurred in Montgomery County, Maryland, in 2017? The annual crime reports from the FBI, Maryland State Police and Montgomery County Police Department provide three different numbers. The number reported by the FBI -- 13 -- is half of what was reported by the state police -- 26. The county police department reported 23 murders that year. A Maryland State Police spokesman deferred questions about the FBI’s much lower numbers to the bureau itself. The FBI maintains it gets the numbers from the state police.