Taken a step further, those arrested are being forced to sign an agreement not to sue... by a judge in order for law enforcement to move past this incident which is still lingering.
First, those signing the agreement to be release are not bound nor are they precluded from eventually challenging the order in the court system.
A good legal team probably could represent those arrested by demanding the judge be sequestered, and questioned as to his connection in this case, e.g., did he sign the warrants or was he involved in any other aspects of this case behind the scenes in support of law enforcement/USG? The USG and law enforcement organizations can be asked to explain why they were given the authorizations, in detail, to infiltrate the bikers? Was it just to keep tabs, say like the broad purpose of the NSA spying on Americans, or was it specific to murders, drug trafficking, money laundering, prostitution, tax evasions, etc. Maybe the purpose was to keep tabs on people who might actually be conservative as opposed to liberals - somehow Hollywood always portrays bikers as right wing types but it seems more likely they fit the hippy-mode better.
Once the shooting started, it must be assumed that the government will be protected since they were most likely federal agencies (however, if they were local police the question arises if "Biker's Lives Matters?" and if the actions of law enforcement will be challenged over bikers the way the black community challenges)....
Find out if the judge (or those close to him) are part-owners of the commercial prison facility. Follow the money!
If the respective motorcycle clubs have not trademarked their colors (back patches and other logos) they should.
Then they would be able to bring suit for trademark infringement upon any unauthorized use of those designs, including LEOs who might use them to incite trouble between various organizations.