I don’t think Sessions could intervene in this case because they are being tried in a State Court. However, if Sessions believed that David Daleiden and Sandra Merritt are being prosecuted wrongfully there might be a Federal case for their civil rights being violated under color of authority. Maybe someone who knows the law can give an opinion.
Upon further review, this might be a case where it would have been best to let sleeping dogs lie. While it is a State case, Sessions might be interested in the findings of their investigation. If the films and interviews turn out to be acceptable in Federal Court, the DOJ might consider a RICO action against PP using the cases in Texas and California. Imagine the libs heads sploding when they try to prosecute on State grounds and the Feds subpoena all their evidence to be used in a Federal case, and they sequester the “suspects” in the State case and they are not available for prosecution by the State.