The accused, Jagpal, was arrested yesterday from Shamli railway station and the weapon used in the crime has also been recovered, Superintendent of Police Abdul Hameed said today.
The boy, a child labour, was shot dead on August 28, police said, adding that the owner of the eatery has also been booked.
Police has registered a case against Jagpal under sections of the IPC as well as the SC/ST Prevention of Atrocities Act in this connection.