Speaking near the scene of Thavisha Peiris' murder, Detective Superintendent Lisa Ray described the attack on the pizza delivery worker as "brutal".
"What makes it more tragic is Thavisha was on his last day, he'd just secured a good job in Sheffield as an IT consultant," Detective Ray told reporters.
More top news
A surge in violent crime and sexual offences has helped push the number of offences recorded by police past five million.
Spain will move to take full control of Catalonia after the semi-autonomous region refused to back down over its bid for independence.
A wanted man turned himself in after losing a bet he made with police on Facebook - along with promised doughnuts.