The House of Representatives has resumed its probe into the attack by a lone gunman at Resorts World Manila (RWM).
During the third hearing on Wednesday, lawmakers grilled policemen from Pasay City and Philippine National Police-National Capital Region Office (PNP-NCR).
Also present are representatives from Lanting Security Specialist Agency, which is the security provider of RWM.
Zambonga City Representative Celso Lobregat is asking the resource persons to name the ground commander in the hotel-casino when the assault happened on June 2, 2017.
Lobregat says, confusion among the security officers may have resulted in lapses and misencounters.
37 persons were killed in that incident at past midnight.
David Ming Huat Chua has also arrived in the House of Representatives on Wednesday.
Chua is the Chairman of Travellers International Hotel, the company that owns and operates RWM.
He lives in Hong Kong and is not a Filipino citizen.
The House Committees on Public Order and Safety, Games and Amusements and Tourism are conducting the inquiry.