The man was helping with information into the death of Jarrod Leigh Turner, 22. Mr Turner's body was found on the side of the road near Richmond on Sunday morning.

Two people were taken into custody, but the 29-year-old man was released without charge on Thursday evening.

A 14-year-old girl has been charged with one count of being an accessory after the fact to murder.

IN OTHER NEWS:

Tasmania Police Detective Inspector Doug Rossiter said the investigation is progressing as planned.

"We believe the people involved in the suspected murder of Mr Turner were known to him," he said.

"There are others out there who know what happened that night and we are calling on them to come forward to police now."

Anyone with information should contact Bellerive Criminal Investigations Bureau on 131 444 or report anonymously to Crime Stoppers on 1800 333 000 or crimestopperstas.com.au.