The Waikato man who raised questions over marks visible on Robin Bain's thumb in photographs taken at the scene of the unsolved Bain family killings is calling for police to investigate potentially ''significant'' other markings.
Earlier this year, David Giles featured on a TV3 documentary after he noticed the parallel lines on the late Mr Bain's right thumb.
It was alleged those marks were caused by Mr Bain loading the magazine into the rifle used in the murders shortly before his death, and led to police re-examining his fingerprints and the firearm.
Mr Giles told the Otago Daily Times while media attention focused on the lines on the thumb, ''I think these other markings are interesting as well and should be included in the investigation''.
An examination of higher resolution photographs revealed those other markings included faint circular marks on Mr Bain's thumb, similar in size to the hole in the magazine, while a mark on his palm was similar to the width of the magazine.
While not saying they were an exact match, Mr Giles wanted his findings investigated. His information had been sent to police to assist their investigation.
''It's possible that they mean nothing, but if they match the magazine then I think that would be significant.''
Mr Giles said he also noted smudging and staining in the photographs of Robin Bain's hands and wanted police to also investigate those discolorations.
''As the Bain case is still an unresolved murder case, I am hoping this evidence will be helpful for the police in their efforts to solve the case.''
Mr Giles said he believed ''David Bain is innocent ... at least on balance of probabilities I figure he probably didn't do it''.
While he believed the parallel lines were caused by the magazine, ''I will remain open-minded until the forensic report comes out''.
A police spokesman said the organisation was awaiting the forensic reports.
