When they entered the bathroom, officers described finding a suitcase with red liquid seeping out."
The evidence obtained by Channel 4 News from the day the MI6 employee was found dead in his central London flat suggests that reports that he was secretly gay or owed bondage equipment are untrue.
The evidence also suggests his mobile phone sim cards were not arranged in a "ritualistic" way and there were no numbers for male escort agencies on them.
This, Channel 4 News understands, is what the police know about the death of the MI6 code breaker, contrary to the speculation which has been in other reports which is apparently based on MI6 briefings.
Channel 4 News reporter James Blake said none of the sexual links or mobile phone details were mentioned in the official police despatch for that day, the CAD.
He also said: "Officers did not touch the body so they were not sure, but one said the apparent murder was a 'neat job', a phrase used by police for a professional killing."
After the police left, the building was locked down and MI5 and MI6 officials rushed to the scene.
The family of code breaker Gareth Williams broke their silence to say they have found speculation over whether his sex life could be linked to his death "very distressing".
Police are still working to establish the cause of Mr Williams' death. They confirmed that he was last seen eight days before his corpse was discovered stuffed into a bag in his flat. His body was discovered on Monday after the police went to do a "welfare check" on him, after a GCHQ colleague sounded the alarm when he was not seen at work...read more