Chilling CCTV footage showing the tragic final moments of two children murdered by their mother has been released by police.

Part-time model Louise Porton, 23, suffocated Lexi Draper, three, then strangled 16-month-old Scarlett Vaughan, just 18 days later because they 'got in the way' of her job as a sex worker.The single mother, who earned a living sleeping with men she met online and sending them explicit pictures and videos, was today found guilty of two counts of murder.