11.   Police are trying to prevent the demonstration from taking place.

12.   Police are trying to trace a red van, which several witnesses reported seeing near the scene of the crime.

13.   Police are trying to trace a young woman who was seen near the accident.

14.   She is claiming that the police are deliberately trying to implicate her.

15.   The accused told the court that the police tried to frame him for assault.

16.   The police are still trying to establish the exact time of her death.

17.   The police are trying to establish contact with the kidnappers.