Teenager Danyal Hussein has been jailed for life for killing two sisters, as part of a Satanic blood pact.
Danyal Hussein, now 19, stabbed Ms Bibaa Henry, 46yrs, eight times before slashing Ms Nicole Smallman, 27yrs, 28 times as she fought back. He then dragged the bodies into bushes at Fryent Country Park in Wembley, north-west London, on 6 June 2020.
Speaking outside court, the sisters’ mother Mina Smallman said justice had been done for her “beautiful girls”.
After calling police to report the sisters missing, no help was sent, and hours later their bodies were found by Ms Smallman’s boyfriend the day.
The jury heard that Hussein apparently thought that if he sacrificed six women, this would help him win a Mega Millions Super Jackpot lottery prize of £321m.
Commissioner Cressida Dick said: “My thoughts and deepest sympathies are with the family and friends of Nicole and Bibaa for their tragic losses.
“The way we responded to information that Nicole and Bibaa were missing that weekend was below the standard we should have achieved and compounded the distress felt by their loved ones.
“While we know that very sadly Nicole and Bibaa had been murdered in the early hours of Saturday, 6 June 2020, before they were reported missing, if we had responded better we may have saved their friends and family immeasurable pain.
“I am very sorry that the level of service we provided fell short. We have contacted the family to ask if they will allow me or, if they prefer, another senior officer to visit them at a time that is right to apologise in person.”