A man has been found guilty of murdering a 32-year-old who was stabbed through the heart on a street.
Jonathan Porritt attacked John Lewis in Crescent Road, Middlesbrough, in May.
At Teesside Crown Court, the 28-year-old, of Crescent Road, was also convicted of possessing a bladed weapon in a public place.
The judge warned Porritt, who police described as "violent and dangerous", that he faces a life term when he is sentenced on Friday.
Temp Det Ch Insp Sarah Robinson said: "As we have seen in this case, situations involving weapons can quickly get out of control and end in tragedy.
"Anyone considering carrying a knife should think twice, the consequences can be devastating."