Ronnie Simpson murder: Police interview 170 witnesses in 'complex' inquiry
Police investigating the murder of a frail man in his West Lothian home say they have spoken to 170 witnesses as part of the "complex" inquiry.
Ronnie Simpson, 67, was found dead at the property in Mayfield Drive in Armadale at about 21:00 on 6 October.
Police said he had been assaulted, sustaining serious head injuries.
Crimestoppers is offering a reward of up to £5,000 for anyone who can provide information which leads to the arrest and conviction of his killer.
Specially trained police officers have viewed more than 40 hours of CCTV footage, but still have to trawl through another 1,000 hours of footage.
Police said 245 pieces of evidence had been seized and 240 houses in the area had been visited during door-to-door inquiries.
In addition, 366 questionnaires have been completed by members of the local community, and police have stopped and spoken to 27 motorists and taken 170 witness statements.
Det Supt Bob Cowper, of Lothian and Borders Police, said: "This is a complex and resource intensive enquiry that is progressing at a steady speed.
"The team are working through a huge amount of information and each piece is scrutinised to ensure no vital piece of evidence is missed.
"As well as the thousands of hours of CCTV footage and hundreds of productions that are being continually worked on, the witness statements are being carefully considered.
"While these have all proved useful and we are continuing to work with specialist agencies, we are still trying to identify the person or people responsible for Mr Simpson's murder.
"The Crimestoppers reward is still very much available and I would encourage anyone who hasn't yet come forward with information to do so - it might become a vital piece in our investigation."
Mr Simpson, also known as Ronnie, was described as a small, frail man who often walked with a stick or crutch.