KANSAS CITY, Mo. — The Chiefs say they are “truly saddened by the senseless act of violence” that occurred at Union Station on Wednesday just moments after their Super Bowl victory parade and celebration through downtown Kansas City. At press time, one person was dead and 18 injured after gunfire broke out at the end of the team’s victory rally, according to police and the mayor. Kansas City Police Chief Stacey Graves confirmed the fatality and said 10 to 15 people had been shot. The team issued a statement confirming all its players, coaches, staff and their families were “safe and accounted …