Najeeb, from Hayin Danmani, a suburb of Kaduna metropolis, was paraded by the state Commissioner of Police, Ali Janga, on Tuesday.
Janga said Najeeb planned with his friends to kill his brother when he overheard his father sending the younger brother on an errand with N30,000.
He said, “After robbing the younger brother of the N30,000, Najeeb and his friend took the boy to the river and drowned him”.
Janga said Najeeb and his accomplice will be charged to court soon, as they have confessed to the crime.
Meanwhile, the suspect, however, denied killing his brother because of the money.
“It is true that when I heard my father sending my brother on an errand with N30,000, I invited my friend and we robbed him of the money.
“But we didn’t kill him because of the money. We normally go to the river to swim and playfully drown ourselves. So, in the process, my younger brother got drowned and died,” Najeeb said.