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He also falsely told witnesses that he was worried because his face matched a police e-fit of the suspect. No such e-fit had been issued."
Do you have a source for this, please? I've read similar somewhere but can't recall where.

. If this is true, it's very odd indeed. How did Barry know he resembled someone in an efit before it was in the public domain?
I read a theory somewhere else (again, can't remember where - perhaps the source wasn't a reliable one) - that he knew he'd been spotted by GUB and anticipated that an efit would result (it didn't).
I've also wondered if the yellow clothing in which he was seen following the shooting was meant as a kind of statement - yellow is an eye-catching colour, in contrast to the dark/ muted clothing seen by the witnesses.
Whatever the truth of the matter is, it appears that whilst BG may not be the brightest button in the box intellectually, he does seem to possess a certain cunning and an ability to plan and execute actions. He was able to approach women using a home-made police badge; he was somehow able to participate in a publicised jump over buses using an alias; he claimed to have won iirc a karate competition; he took photos of hundreds of women without their knowledge and without being caught.
This doesn't necessarily mean he's Jill's killer, but he's clehttp://news.bbc.co.uk/1/hi/uk/1313509.stm#:~:text=Much%20of%20the%20prosecution%20case,the%20defendant%20have%20to%20fear?ver enough when it suits.