Court documents released Friday say a sports jacket with blood on it was seized from the home of Richard Oland’s son as part of the investigation into the prominent businessman’s death.

The documents, which are transcripts of testimony from a lead investigator in the case, say the brown jacket found in the home of Dennis Oland is a key piece of evidence in the investigation.

A dry-cleaning tag was also found on the jacket.

The testimony was given during an in-camera court proceeding in July 2012 but portions of it were made public Friday after some media outlets fought for it to be released.

The documents don’t indicate whose blood was on the jacket, however. The documents say the blood was tested but the results of the tests are redacted.

Police in Saint John have said Richard Oland’s son is the prime suspect in the case but no charges have been laid and no arrests have been made.

The transcripts also show that, while investigators have their suspicions, they aren’t certain about the type of weapon used in the attack against Richard Oland.

Richard Oland, 69, was found dead in his uptown Saint John office on July 7, 2011.

In the days following his death, searchers combed through several areas of Rothesay, including Dennis Oland’s property where police seized 57 items.

Police are still looking for Richard Oland’s cellphone and a red bag believed to be linked to the murder.

Saint John Police Chief Bill Reid has said he expects to make an arrest in the case by the end of this year.

With files from CTV Atlantic's Ashley Dunbar and The Canadian Press