A 'toy boy' who killed his lover's husband by beating him to death in the street has been jailed for more than six years.
Cohnor Coleman, 24, repeatedly punched former golf pro Andrew Jackson, 43, following a night out in Richmond.
The jury at Teesside Crown Court cleared Coleman of murder but convicted him of manslaughter.
Coleman, of Cookson Way, Brough with St Giles, near Catterick, attacked Mr Jackson because he was "frustrated and angry" after seeing 38-year-old Sarah Jackson with another man in a bar.
He had started a sexual relationship with Mrs Jackson around three weeks before the killing and said he believed they had a future together.
All three were drinking in the Cavern bar in Richmond town centre on the night of the attack in April.
The Recorder of Middlesbrough, Judge Simon Bourne-Arton, jailed Coleman for six years and nine months today.
Judge Bourne-Arton said Mr Jackson was rendered unconscious by Coleman's first punch but said the killer delivered four or five more "heavy blows" while his victim was on the ground.
He said: "You repeatedly punched Andrew Jackson while he was on the floor unconscious. This was an unprovoked attack on a defenceless individual."