Police investigating the death of a father of four on a Cambridgeshire travellers' site said they were met by a "wall of silence" from the two families.
Today, 43-year-old Mark Mosley was jailed for life for the murder of Jessie Smith. He was shot three times during a bare-knuckle fight at Burwell.
Police were commended by the judge at Cambridge Crown Court for their handling of the case.
Speaking after today's sentencing, Det Insp Al Page, of Cambridgeshire Police, said his officers had had to work hard to earn the trust of Mr Smith's family.
"The complexity was the wall of silence that met us. The travelling community don't talk to police officers."
Today, Mr Smith's widow and other family members celebrated outside the court as Mosley was told he would serve a minimum of 30 years in prison.
Lisa Smith thanked police and said she was looking forward to spending the evening with her children who would be "happy... not crying".
ITV News Anglia correspondent Matthew Hudson was at court today. Watch his report below.