Montri, who remained at the palace following Srirasmi’s downfall, is accused of defaming the monarchy by improperly using his royal connections to make financial gains, police said.
“Montri has claimed that he is close to members of the royal family to make profit for himself” in land and business deals, national police chief Somyot Poompanmoung told reporters.
“The former princess recruited him to work for her and he has nothing to do with the Crown Prince,” he added.
At least eight of the former princess’s family members have now been jailed for lese majeste -- including her elderly parents, her elder sister and brother-in-law, two brothers and a nephew.