CEBU CITY - The family of the 4-year-old boy who was killed by a stray bullet from a drug operation here sought the help of the National Bureau of Investigation (NBI) Friday.
The family said they want to find out whether the bullet that killed the boy came from a police rifle or a drug suspect's firearm.
The NBI has invited four witnesses to give their respective testimonies.
Police earlier said the bullet that killed the child Tuesday came from the suspect.
On Friday, the Cebu City Police began its probe into the boy's death.
Four policemen involved in the drug operation underwent ballistics examination and paraffin tests to identify the source of the fatal bullet. - with reports from Joworski Alipon and Aiza Layague, ABS-CBN News