Traditionally, for thousands of years, the standard method of escape from a crime scene was for the perpetrator merely to run away, faster than the constable on patrol, sheriff, or the night watchman. This was common even into the 20th century. For example, according to the Warren Commission report, Lee Harvey Oswald infamously walked, then ran away from the Texas Book Depository from where he shot President Kennedy on November 22, 1963. If another means of transportation becomes unavailable, the suspect may have to run.