Upon request he will be entitled to a court appointed lawyer on appeal in California. Ineffective assistance of counsel is a very common grounds for appeal; the defense attorney will not usually take offence and may help. Also make sure that trial counsel assists with filing a timely notice of appeal.
I believe the negatives may have significant value if only as a collectible. However, you need to handle this confidentially through an attorney or agent skilled in negotiating such matters. The type of answer and options you need are not going to be aired in a public forum but only through a confidential consultation. Hire a lawyer who is interested in suchmatters.
I disagree here. If a potential client wants to give a fake name at the consultation stage that is their choice. In Europe and elsewhere they do have KYE (Know Your Client) laws requiring positive ID and they also have watered down confidentiality rules. I can think of many legitimate reasons why someone may not want to release their name.
The PC 288 conviction will make your life difficult after parole. As my colleagues point out passage of time will be an issue but if you plan on doing anything, better do it now. You will need to hire an attorney willing to move quickly and you will also need medical records and experts to back up your claims.
There is potential criminal case for extortion and definitely a civil one. However, if you sue or file criminal charges the details will be a public. In a case like this a lawyer's confidential intervention can be helpful in dealing with the blackmailer.
Use a bank wire, it is a cheaper and you may find Western Union less than cooperative with larger wire transfers. I disagree with my collegues, the government does not really care as long as it is for a legitimate business purpose. There is an automatic report generated as with all transfers over $10,000, unless you are wiring it to Sudan or Yemen, it will scarcely attract attention. And do use a bank wire instead of Western Union which would involve withdrawing cash from your business...