Police officers were on the scene quickly having been called to a similar burglary less than an hour before just 20 doors from Mr Riat's home. Again a ground-floor flat had been burgled. A watch was stolen from the mantlepiece in Gina Davidson's home but the raider failed in an attempt to take her stereo system and DVD player, which had been dropped on the settee below the open window. Miss Davidson, 23, was sceptical about the idea that a chimpanzee might have been trained to carry out the theft. "I suppose it's possible but it seems rather far-fetched - it would have to have been a pretty intelligent monkey to unplug the stereo and carry it over to the window," she said.