Beginning next week, Snowden plans to take a leave from his job in the attorney general's office so he can "pursue these claims freely without the appearance of conflict," according to an earlier statementfrom Hansel.
The notification letter was also sent to the state treasurer, said Hansel, who does not expect the suit will be filed against the state.
An Anne Arundel County police spokesman declined to comment.
Leopold's spokesman directed inquiries to Hodgson, who said it was premature to discuss the case.
"If and when he files a lawsuit, then we'll evaluate it at that time," Hodgson said.