Shahabuddin, who lost his right leg in the incident, identified head constable Rameshwar Prasad during a test identification (IT) parade at the SKMCH on Saturday, Sep 12.
The officer in-charge of Muzaffarpur GRP Shashibhushan Singh, a GRP inspector, besides several RPF officers were present when the identification parade was held, a private television channel reports.
All the seven RPF personnel, including the accused head constable, and five other persons were presented before the boy during the TI parade who identified Rameshwar Prasad as the one who threw him off the running Gwalior Mail.
Meanwhile, Shahabuddin's condition is said to have deteriorated further. Shahabuddin says that he was pushed out of the running train when he refused to give a bribe to Prasad.
A case has filed against the arrested head constable and he is being interrogated.