ANGELES CITY - The city police has already established the identity of the lone suspect in the slaying of an American national and four others on Thursday.

The alleged killer, Mark Zamora Dizon, of Barangay Salapungan here was identified by security guards who saw the suspect's photograph at the social website Facebook, said Senior Superintendent Danilo Bautista.

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Couples Albert and Jeanette Androneda Mitchell; housemaids Marissa Prado and Isabel Pajardo; and driver Boy Vergara, were shot dead inside an apartment along Manuela Street at Hensonville Court Subdivision in Barangay Malabanias at noon on Thursday.

The security guards of the said subdivision were able to hold the suspect for a while but were able to elude him.

Bautista said that the guards described the suspect to Mitchell's relatives.

Dizon was a suitor of Mitchell's daughter who is now married and staying in the US, added Bautista.

The city police are now tracking down Dizon and will file a case of robbery with homicide against him on Monday.

Bautista said they have waged a manhunt operation against the suspect who was able to escape shortly before security guard Angelito Prado, brother of Marissa Prado, learned about the incident.

The victims sustained gunshot wounds in different parts of their body and were already dead when found by Prado.

Bautista said Prado and another unidentified guard earlier held the suspect who apparently came from the victims' apartment.

The guard reportedly called his wife at the apartment but no one answered the telephone. This prompted him to proceed to the apartment where he discovered the victims who were already dead.

Bautista said the guard hurriedly went back to the guard house but the suspect was no longer around.

The unidentified guard told police that the suspect asked permission to load his cellphone but never came back.

The guard said the suspect, who was wearing a white shirt, about five feet and six inches in height, white complexion and in his early 30s, boarded a motorized tricycle.

Bautista said robbery could be the possible motive of the suspect as Mitchell's laptop, jewelry and cash were missing.

Responding police recovered 13 bullet shells that of a .9mm caliber pistol at the crime scene.

Bautista said they are also theorizing that Dizon is also responsible in the slaying of other foreigners.

"Sa three incidents involving death of foreigners, all empty shells recovered were fired from one and same gun caliber 9mm," Bautista said. (Reynaldo G. Navales)