The he looks like he was in a fight is irrelevant really.
Was she able to describe his face, hair colour, build, scars, tattoos if he has any - the details that really do matter.
It's not irrelevant if a man dressed like RA was seen leaving the area of the murders, walking towards the area RA's car was allegedly parked. She doesn't have to have intricate knowledge of his appearance for the prosecution to use her statement as just one more piece of circumstantial evidence that ties RA to the crime.
The case doesn't solely rely on her testimony to prosecute. It's her testimony with all of the other pieces of circumstantial evidence that start to paint a picture that makes it very unlikely it was anyone other than RA.
People can pick apart a single piece of circumstantial evidence and pretend it has no relevance all day long. The thing that seems to be forgotten is it's the
totality of circumstances that is being examined, not each piece of evidence in a vacuum.
RA just fitting the description of BG doesn't mean anything by itself.
RA just admitting he was wearing the same clothing as BG in the video doesn't mean anything by itself.
RA just being seen by three females on the trail that day, who he also admits seeing, doesn't mean anything by itself.
RA just somehow losing a round that was forensically linked to his firearm between the two bodies doesn't mean anything by itself.
RA just claiming his nose was buried in his phone, looking at a stock ticker, while there is possibly dispositive evidence of him being on his phone at this point in time doesn't mean anything by itself.
RA just owning a car that fits the description of a car seen parked at the CPS building at the time of the murders doesn't mean anything by itself.
A man fitting RA's description being seen walking away from the area of the crime scene, towards RA's car doesn't mean anything by itself.
RA just confessing to random people a dozen times doesn't mean anything by itself.
However, if one were to start connecting some dots... a pattern might emerge...
JMO