THE Bureau of Jail Management and Penology (BJMP)-Central Visayas has placed all the personnel of Mandaue City Jail under investigation following the murder of inmate Steve Go, an alleged drug lord.

Chief Inspector Dennis Aliño, the BJMP-Central Visayas information officer, said the focus of their inquiry on how the murder weapon, a .38 revolver, was sneaked inside the facility.

"Naa gyoy makita nga presumption sa pagpabaya," he said on Wednesday, June 20.

Mandaue City Jail has 55 personnel, including the jail warden. They will face possible relief.

Aliño said they welcome any investigation from other government agencies, including the Commission on Human Rights and National Bureau of Investigation.

Go's killer and fellow inmate, Cresenciano Heyrana, has been secured to prevent future violence.

READ: Detainee shoots, kills Steve Go in Mandaue jail

Heyrana, a resident of Tawason, Barangay Canduman, Mandaue City, had been detained for multiple criminal charges -- violation of Republic Act 9165 (Comprehensive Dangerous Drugs Act of 2002), illegal possession of firearms, murder and resistance to an agent in authority.

Aliño said Go, who had an enlargement of the heart, often instigated trouble in the past.

Go was an inmate of Mandaue City Jail from 2009 until 2014. He had been jailed after his involvement in a robbery with homicide incident.

He was transferred to Talisay City Jail for starting a riot, then to Carcar City Jail and back to Talisay City Jail. Afterwards, he was returned to Mandaue City Jail.

"He was influential to his fellow inmates," Aliño said. (KAL/SunStar Cebu)