A man seen sniggering after he murdered a complete stranger in a "senseless" random attack will be sentenced today.
An inquiry by the police watchdog is under way into events linked to the murder of student Kieran Crump Raiswell.
The killer, Imran Akhtar Hussain, carried out an earlier attack on a stranger but was not arrested even though his victim gave police his car registration details.
Kieran was stabbed in the chest four times without warning by Hussain, 27, who approached him in the street in Whalley Range, Manchester.
Hussain was seen by witnesses laughing and sniggering as he ran back to his car.
The attack on January 16 took place 12 days after Hussain had targeted another stranger when he drove to Nottingham and punched a man before running off.
Hussain was yesterday found guilty of Kieran's murder and will be sentenced at Manchester Crown Court.