AB gave a decent description despite such a fleeting glance at her: girl had her back to AB, was wearing dark blue top and dark baggy trousers, dark brown hair.
Please don't alter the known facts to suit your own narrative there is enough confusion in this case already.
She was unable to identify the female, but gave a description of someone with black, shoulder length hair, which seemed to be contained like a ponytail, wearing a navy blue jumper with a hood and a pair of lighter trousers, which she took to be a pair of jeans.
From <https://www.scotcourts.gov.uk/search-judgments/judgment?id=e2988aa6-8980-69d2-b500-ff0000d74aa7>
DF's argument regarding the evidence given by RW and LF:
Counsel also drew attention to pages 344 to 345 of the transcript of proceedings of 1 December 2004, which recorded the evidence of Lorraine Fleming. She had seen news photographs and reports of the appellant. It was contended that what she described amounted to the "building up of a piece of evidence" concerning identification. It was submitted that the foregoing examples showed that media coverage had had a significant influence in relation to witnesses.
From <https://www.scotcourts.gov.uk/search-judgments/judgment?id=e2988aa6-8980-69d2-b500-ff0000d74aa7>
RF&LW described the person that they saw as looking 'cheesed off' and 'up to no good' no sign that he's just committed a murder at all he just stood out because he was dressed differently.
"The picture which triggered your memory is one we have not yet seen in this court. You might not like it but it has to be right."
He said whatever the picture was, it could not have been Luke Mitchell.
He added: "What it does demonstrate, does it not, is that people, however genuine, however honest, however hard they are trying, people can sometimes make mistakes which can have very serious consequences."
"Yes," agreed Mrs Fleming.
From <http://news.bbc.co.uk/1/hi/scotland/4058945.stm>
"AB didn’t say it definitely wasn’t him — she said she ‘didn’t know’. She was simply being honest."Source?
AB said Luke Mitchell was not the man she saw and that it was not a parka
AB was also supposed to be an independent witness. Her brother in law is a close family relation to Jodi's family and was in and out Jodi's Grans house in the first weeks after the murder. This was discussed at trial with DF quizzing Janine on how well she knew AB and her husband.
-Innocents Betrayed
It's great to have an opinion but it's even better to keep an open mind in the face of new information.