The 24-year-old, from Quarry Bank, was stabbed to death at Chicago’s Stourbridge home in 2017. Kobe Murray was cleared of the murder by a jury the following year. He admitted to stabbing amateur footballer Mr. Passey, but the jury accepted that he did so in self-defense.
Mr Passey’s family remained frustrated in their attempts to enlist the support of West Midlands Police in their campaign for justice.
They said a letter to the force went unanswered, while Stourbridge MP Suzanne Webb, who supports the family’s campaign, also said she received no response from police chiefs.
Ms Webb said it would be a “positive step forward” if the police decided to cooperate.
West Midlands Police said they have worked closely with the family “over the years”.
Ms Webb said: “My thoughts are very much with Ryan’s family and friends four years after his untimely and unnecessary death.
“As each year goes by without justice it must become more difficult for them but I pay tribute to their tenacity in demanding justice for Ryan.
“My commitment to the campaign is not wavering. I have met with the family’s private investigator and it is clear that issues are still emerging and could be significant.
“I have also contacted the West Midlands Police, who still have not responded or engaged with myself or the family. It would be a positive step forward if the force did.”
Private Detective Russ Winfield, a former detective for over 30 years, had previously told the Express & Star that the Passeys “were struggling to maintain any form of trust in the West Midlands Police” due to lack of cooperation.
This comes after the official launch of civil proceedings brought by the family against Mr Murray last month.
Lawyers attended a preliminary hearing at Liverpool County Court, with a full hearing due to take place at a later date.
A West Midlands Police spokesperson said: ‘We have worked closely with Ryan’s family in their demand for justice and fully understand their pain. A 19-year-old man has been charged with Ryan’s murder, but a jury found him not guilty.
“Over the years, we have written to them and shared information with them and held meetings with senior officers, including the Deputy Chief of Police, to offer them all possible support and answers.
“If significant new evidence comes to light, we will review and seek to reopen the case if appropriate.”