Sheriff, in the United States, a public official, usually elected, who is in charge of law enforcement in a county (or parish). A sheriffs principal duties are to enforce the law and to carry out decisions of the county court. A sheriff serves legal papers, summons jurors for the county court, and maintains the county jail. One or more deputy sheriffs may be appointed, and other persons may be deputized when needed. The office originated in England in about the ninth century. A sheriff was the king's overseer in a shire, the old term for county.
In murder-mystery TV shows, detectives look for clues to find the killer. Part of that involves getting into the murderer's mind-set. What factors make it easier for one person to take the life of another?
Today, some police forces are using virtual reality technology to capture and recreate crime scenes digitally. They've discovered that, if used properly, virtual environments help the investigation process from its earliest stages all the way to a verdict.