Very thought provoking should he get off on a technicality without being questioned.
I wonder if he is the man seen by Tamsin Silence. She was only twelve at the time when she gave her description so it might not be possible to pick him out of a lineup now.
Snip
Swan said two reliable witnesses had also identified a man who was loitering in the area around the time of Madeleine's disappearance as having facial scarring.
"The photographs one has and the descriptions one has of Christian B, the suspect, is that he is a heavily pockmarked man. In other words it's possibly from a case of adolescent acne, but his skin is very marked."
https://www.newshub.co.nz/home/world/2020/06/madeleine-mccann-expert-says-evidence-points-to-suspect-s-involvement.html
The idea that he was heavily pockmarked seems to be a media exaggeration.
Concerning the individual, she describes him as being: Caucasian race, light skin, so he wasn't Portuguese, but could be British, according to her criteria. Approximately 180 cm tall, thin complexion, 30/35 years of age. Short hair, like shaved with 1 cm of length and fair, but she isn't sure if it was blonde because the sun was reflecting, and made perception more difficult. She didn't see the eyes because he wore dark glasses of black colour, with a structure of mass, a thick frame. He had a large forehead. Nose of normal size, a bit pointy and sharp. Large ears, close against the head. Mouth with thin lips, she didn't see his teeth. Chin pointing up, which stood out on a face that she describes as sharp. No beard, no moustache, a clean shave.
No other special signs, apart from some small pimples on the face as a result of shaving.https://www.mccannpjfiles.co.uk/PJ/T_M_S_AGE_12.htm