If he’s innocent, he needs the police to find Libby. If he’s guilty, the police need to find Libby or get a confession. If he trains in those fields with his sports club and has already admitted to having her in his car, then any evidence placing him in the fields (if it transpires that’s where a crime took place) or placing Libby in his car (unless it’s blood) is circumstantial.
Interesting point. It would be good to know if his English is fluent. An interaction between someone who is intoxicated and upset and someone with an accent and limited English language could be challenging/ lead to miscommunication.
A news article said a neighbor was asked to call the landlord for his wife because her English isn't good. He works at the same place as her, it seems to employ a lot of foreign workers.
We don't know how good his English is but I don't think it needs to be good based on his job. We know his wife doesn't speak much English though