Rebecca Mundy, deputy chief crown prosecutor, said the CPS had worked closely with Essex Police to examine and review material obtained during previous investigations.
“We have established that there is sufficient evidence to charge 12 people with the offence of manslaughter and that it is in the public interest to pursue criminal proceedings,” she said.
Mundy warned people about the risks of commenting about the case online.
“The Crown Prosecution Service reminds all concerned that proceedings against the defendants are now active and that they have a right to a fair trial,” she said.
“It is vital that there should be no reporting, commentary or sharing of information online which could in anyway prejudice these proceedings.”
