The cases were filed with the ACC's coordinated district office, Dhaka-1, on Tuesday, said Pranab Kumar Bhattacharya, the spokesman for the anti-graft body.
Samrat, the former president of Jubo League’s Dhaka South unit, came under the scanner over his alleged ties to the illegal gambling business after the Rapid Action Battalion busted casino operations in numerous clubs in the capital in September.
He subsequently went into hiding before being arrested along with Arman in Cumilla on October 6.
The RAB later conducted a raid on Samrat’s office in Kakrail’s Bhuiyan Trade Centre with him in tow.
A mobile court handed Samrat a six-month prison sentence for possession of the kangaroo skins under the Wild Animal Protection Act and he was later sent to the Dhaka Central Jail in Keraniganj.
Two cases were also filed against him under the Narcotics Control Act and Arms Act with the Ramna Police Station.
A court granted 10 days to grill Samrat in two separate cases involving illegal arms and drugs On Oct 15. Arman has been placed on a five-day remand in an arms case.