Giving the defense all this to pick apart may not have been a great move, unless they have something like that up their sleeve.
I don't think there is any doubt they have an eye-witness/accomplice. Them laying it all out on the table and establishing the key facts was a show of strength rather than the displaying a relatively weak fact pattern, missing evidence, holes to exploit, credibility to undermine, etc. It seems like the ONLY thing they don't have is the murder weapon.
them other two dudes would also have been gettin arraigned in the same room...somebody done gone and told something. damn, gonna miss that td dance though.
any transcript to the arraignment though? all this talk of texts, and video feeds across the city is super incriminating though