Police are urging people to come forward, including the driver of a white motor home following a fatal crash on the M2 yesterday.
An elderly man died and a woman was seriously injured in the accident between junctions 3 and 4 for Gillingham.
Meridian spoke to Inspector Martin Stevens from Kent Police.
More top news
Gravitational waves - ripples in spacetime - have been detected by scientists a century after Albert Einstein predicted their existence.
Reading host Burnley in the Sky Bet Championship on Saturday
Brighton host struggling Bolton Wanderers at the Amex Stadium on Saturday.