A killer who violently stabbed and beat a boy to death brandishes a knife in an alarming video that was filmed just moments before the attack.

Ali Zahazwy and Femi Cela, filmed themselves driving as Zahazwy wields a knife around.

In the ten second video he says: “Listen yeah, tell Monks Hill, Money Habits, shanking habits, yeah watch.”

Both boys and a third, Rodney Mukasa, killed former classmate and aspiring rapper Andre Aderemi, 19 in a vicious pre-planned attack, last August, in Selsdon.

Cela, 19 of Fryston Avenue, Croydon received 16 years for manslaughter, while Mukasa, 20, of Greenview Road and Zahazwy, 20, of Bramble Road, Shirley, both received life sentences with a minimum term of 22 years.