Victim: Rudy Smith, 41.

Date and location of murder: unknown.

Circumstances: Rudy Smith’s last known whereabouts was One-Way Deepdale Road in Pembroke on July 9, 2012.

Mr Smith has not been seen since — although the motorcycle he was last spotted riding was discovered in the water off North Shore near Grace Church, Pembroke, not long after he disappeared.

The lack of any trace in the 11 years since sets his disappearance apart from the island’s 32 other unsolved murders since 2003.

Police acknowledged as much that August, when they announced they were in the “unusual position” of treating it as a murder investigation.

Public expressions of grief from his family, who repeatedly pleaded with the community to help them gain closure, have failed to yield leads.

But his loved ones, along with police, remain adamant that those with knowledge of the case must come forward.

Detective Inspector Jason Smith, commenting on the 20th anniversary of Mr Smith’s disappearance, said investigators had “a number of persons of interest to this inquiry”.

He added it was believed that “there were a number of people directly involved in Rudy Smith’s murder”.