I assume you don't want sources for factually and easily verifiable claims about trial dates, transfer dates, when he was released from Molde, Norway's extradition treaties and Interpol's reach.
Solbakken congratulated Sarr for signing with Yenisey
on Instagram. The fact that it was Sarr's buddy that didn't show up to witness against him is confirmed by the state's attorney
here. Solbakken's claim that Sarr was going to show up for the trial meeting that was delayed is solely based on Sarr's word, and Sarr also promised to show for the next trial meeting. That was of course a lie, he never did, so there's no reason to believe that he planned to show in the first place either.
Solbakken's contact with the state's attorney is shown several places, but for a clear statement see
here.
The claim that Solbakken was Sarr's representative for the Saudi Arabia deal is sourced in
this article from Josimar, and a screenshot of Solbakken texting with Kalidou Ousmane about the deal can be found
here and
here.