A depraved gang leader who filmed himself humiliating a 91-year-old woman and her carer at knife-point has been jailed indefinitely for an attack that filled a judge with 'utter revulsion'.
, 21, who led the Brixton Hill Blood gang in south London, is believed to have made the film as a 'trophy' to show other members.
The fiend broke into the 91-year-old woman's flat and filmed her carrying out sex acts with her elderly carer before cutting the phone line and threatening to return if they called the police.
Lewis, known as 'Joker 187 General' - 187 being the code for murder in the US - will serve at least eight years
before he can be considered for parole after being branded a 'danger to the public'.
Sentencing him at Inner London Crown Court, Judge Roger Chapple described the case as one of the most 'sickening and harrowing' he had ever heard.
He said: 'It demonstrates that there are no limits to the depths of depravity that some will descend to. so why not give him a 'whole life' sentence then, judge?
They went into the resident's room and found her sitting on her bed. She told him to get out but Lewis growled: 'Tell her to be quiet, or I'll hurt you.'
The carer did as she was told and he assaulted her as the older woman continued to scream.
He warned: 'Tell her to stop, because for me killing is no fear.'
The carer led him to a jar containing £100 hoping to end their ordeal but Lewis, who continues to deny his involvement, kept going.
The attacks - captured on his phone - continued for several more minutes while the courageous older woman tried to fight him off with her walking stick.
The shell-shocked carer began writing down an account of what had happened, before finishing her chores and handing over to the next helper.
She went home and took two baths but said nothing to her husband and continued with her own household duties.
The following day she went to the police but only to try and stop an attack on someone else.
She described Lewis' hunched stance and DNA tests on a body hair found stuck to some carpet tape led officers to him.
Mobile cell site evidence and CCTV from a nearby takeaway also suggested he had been very near the scene that night.
Paul Raudnitz, defending, said Lewis had a 'troubled and difficult' upbringing with a 'violent' father and a mother jailed for 12 years for drug trafficking when he was just 12. He worked occasionally as a security guard at music festivals.
Lewis, of Vauxhall, south-west London, was found guilty of false imprisonment, false imprisonment with intent to commit a sexual offence, robbery, sexual assault, causing a person to engage in sexual activity without consent, assault by penetration and making threats to kill.