Thinking about this some more, it's quite possible that the CA's lawyers were loose with their language. The full footnote reads as follows:
"Upon information and belief, shortly before Magbanua's retrial in May 2022, the State may have offered to consent to Magbanua's pretrial release on a bond if Magbanua agreed to delay her retrial so that the State could try Magbanua and Mr. Adelson jointly. Also upon information and belief, before Magbanua's retrial, the State offered to provide Magbanua with immunity for the charges against her, if Magbanua agreed to cooperate with the State and to testify against Mr. Adelson. Magbanua rejected the immunity offer and was convicted at her retrial."
The first sentence refers to "shortly" before the retrial; the second sentence just says before the retrial. Perhaps the reference is to the long-rumored immunity offer before the original trial. If that's the case, it's technically a true statement (it was before the retrial) but quite misleading. The above-the-line text to which the footnote is attached is: "Mr. Adelson is in a unique position [from KM], factually and legally, for the purposes of his request for pretrial release." That sentence is trying to argue that the issues for bail between KM and CA are different. I'm not sure of the relevance of either claim in the footnote to that assertion.
So either the State made a crazy immunity offer between the two trials and KM even more absurdly turned it down, or CA's lawyers accidentally wrote a misleading sentence, or CA's lawyers intentionally wrote a misleading sentence. If I had to bet, I'd bet on the last theory. And the idea would be that they are trying to get into the judge's mind that the case against CA is so weak the State had to resort to offering to allow a murderer to go free to get him.