Video footage has revealed the moment a City banker shrugged and faked sadness during police interview as he was accused of murdering an escort mersin in a cocaine-fuelled rage.

Father-of-two Zahid Naseem, 50, battered £2,000-a-night private escort Christina Abbotts to death with a mortar in a Crawley, West Sussex flat on her 29th birthday in 2018.

CCTV in a new documentary shows the moment the former investment consultant, who earned upwards of £250,000-a-year as a City trader, shrugs as he tells detectives he couldn't remember what happened on the night of Christina's murder.

Footage from inside a police interview room reveals Naseem appearing to look solemn and upset as he tells officers of his 'shock' at her death.

In one clip, he can be seen slumping with his head down, while another shot appears to show him turning his body away from the detectives who are quizzing him. 

Body language experts have picked apart the scene and confirmed investigating officers' suspicions - that Naseem was lying and subtle gestures gave his guilt away.  

Dr Cliff Lansley told Discovery's Faking It that murderer Naseem 'sulked' and faked sadness to try and 'get police on his side'. 

Detectives also pointed to his head shake, flickering eye and defensive posture and said it was 'very clear' that he had lied.