A man has been cleared of attempted murder but jailed for his part in a shooting which took place at High Elms Manor last summer.
Police were called to the country house in High Elms Lane on the evening of June 12, 2016, after trouble broke out.
The party - hosted by a music company - had an ‘all-white dress code’ and a 28-year-old man was shot in the shoulder.
Sharriff Dacres, 22, of Cotterells in Hemel Hempstead, was found not guilty of attempted murder by a jury at Harrow Crown Court.
But he was found guilty of the possession of a firearm and was sentenced to seven years in prison.
His cousin, Alexander Dacres, 27, of Tudor Avenue, Watford, was found guilty of possession of a firearm with intent to endanger life, possession of ammunition and possession of a firearm without a certificate and was sentenced to eight years in prison.
He also received a six-year term after being found guilty of possession with intent to supply a Class A drug, so was sentenced to a total of 14 years in jail.
Detective Inspector Justine Jenkins, from the Beds, Herts and Cambs Major Crime Unit, said: “This violent incident was extremely unusual for the area and caused considerable concern among the local community.
“Many of those at the party on that day had travelled from outside the area to attend including some London rap artists.”
“This was a complex investigation and officers worked hard to bring the offenders to justice.
“I am pleased with the sentences and I hope this sends a strong message to potential offenders that violent crime will not be tolerated in Hertfordshire.”