He was arrested late on Wednesday evening from a village under Amba police station area in Aurangabad district by a joint excise and police team.
The two were being taken to Gaya central jail for interrogation, Magadh Zone Deputy Inspector General Saurabh Kumar said.
Rocky was absconding since the death of Aditya Sachdeva, son of a Gaya businessman, allegedly due to bullet he had fired from his pistol at the car that had overtaken his SUV on the way to Gaya from Bodhgaya on Sunday night.
On behalf of Manorama Devi, advocate Qaiser Sarfuddin filed the bail petition in the court of (in-charge) District Judge S N Singh who posted the matter for hearing on Monday.
A list of legislators who have brought shame to Nitish in the last 6 months
Shouting slogans, BJP leaders and workers -- including Prem Kumar, who is the leader of opposition in Bihar assembly -- took to the streets, demanding arrest of Rocky.