Thefts and robberies have almost doubled from last year, said Dallas Area Rapid Transit.
According to the Dallas Morning News, DART's Chief of Police said the economy's downturn has a lot to do with the increase in crime.
Last month, a group of juveniles allegedly attacked a man at the MLK Station around 6:40 p.m. for his iPod.
19-year-old Octavius Lanier, was knocked into the side of the train and pinned between the train and the platform as it pulled away from the station. He died from his injuries.
DART warns passengers to conceal their expensive items and hit the red warning buttons on the trains and buses or call police if they feel threatened.
DART has about 115 trains in operation at any given time, therefore, placing officers on every train is both impossible and impractical.
NBC5's reporter Ben Russell contributed to this account.