The Liability

The Liability is a 2013 British crimethriller film directed by Craig Viveiros and written by John Wrathall. The film stars Tim Roth, Talulah Riley, Jack OConnell and Peter Mullan. The film is about a teenager sent to do a day of driving for his mums gangster boyfriend, which leads him into world of crime.

Not pleased, Roy uses Adam to hitchhike and they steal a van from an elderly couple. They call the girl on Adams phone that was left in the car she took, striking a deal to give her 7000 in return for the bag of evidence that was left in the vehicle, even though Roy doesnt actually have the entire amount. Roy robs a diner to make up for the rest. He holds the diner employees at gun point and uses them as hostages to make sure the deal goes through.Having redeemed the bag, Roy and Adam plan to switch automobiles and dispose of the evidence. However, Roy knocks Adam unconscious at a quiet roadside area. Before Roy can kill and dismember his body, the girl, who followed them, runs over Roy and kidnaps Adam. ........

Source: Wikipedia