Police have been searching trains in Coventry for a man suspected of assaulting an officer.
The attack happened around midday on the 2nd of October on the M42 between junctions 7 and 6 near the NEC.
The man was pulled over by police, but assaulted an officer and ran across the motorway to escape.
He then jumped on a train at Birmingham International Airport.
Teams of officers and a helicopter were sent to the next stop at Coventry to intercept the train and catch him.
At the moment he is still missing.