Bolton murder suspect Mark Kitchen was identified by his next door neighbour after he saw CCTV footage on a Crimewatch TV appeal, a court heard.
The CCTV images were also shown on this website at the same time.
Peter Norris, a warehouse worker, told Manchester Crown Court he was watching the programme with his girlfriend and told her: "I think that's my neighbour, Mark."
Kitchen is accused of stabbing his sister, Sarah Melia, 10 times at her home in Catherine Street West, Horwich, on January 14 this year.
The prosecution allege he was seen on CCTV in the area wearing a distinctive red coat, shortly before Ms Melia was killed.
Mr Norris told the court he would see Kitchen most days, walking near his home.
He said: "He would wear those clothes - a red jacket, blue jeans and white trainers - all the time. It was all I would ever see him in."
A few days after the Crimewatch appeal, Mr Norris saw the same CCTV footage on a television news bulletin, which reinforced his view and he contacted the police.
The court also heard from Kitchen's aunt, Elizabeth Brown, who said she thought it was him after watching the CCTV footage, but she added she could not be sure because she could not see his face.
The court previously heard from Kitchen's mother, Marion Kitchen, who also identified him as being the man in the red coat when police showed her images to prepare her for media coverage to help hunt for the killer.
The jury has heard that Kitchen, aged 37, of Richard Gwyn Close, Westhoughton, suffers from paranoid schizophrenia and was taking prescription drugs, but on occasion he mixed them with illegal substances which made him dillusional and violent.
The trial continues
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