Cyclist who saw teenage boy drown in a canal 'thought he must be dangerous because police didn't go in to save him' 

Cyclist who saw teenage boy drown in a canal 'thought he must be dangerous because police didn't go in to save him' 
Ailish Tynan told an inquest at St Pancras Coroner's Court she saw Jack Susianta, 17, (pictured) in the canal at Walthamstow Marshes, east London, as police looked on from the bank.