*UPDATE: 4:30 p.m. After six hours the 101 eastbound at the 405 was reopened. No witnesses have come forward with information about the incident, which is believed to be a car-to-car shooting that took place following a dispute. Police are asking for any witnesses to come forward to help the investigation. This is the second post-argument car-to-car shooting on the 101 in the Valley this year. *UPDATE 10:40 a.m.:The eastbound 101 at the 405 has......