The daughters of murder victim David Fisk say they are struggling to comprehend how their father, his wife and her relative became the random targets of a disgruntled hotel employee.

Speaking for the first time, Brittany and Lacinda Fisk said they were also finding it frustrating getting help from the Department of Foreign Affairs and Philippine authorities.

“For someone to take just take our father away from us so cruelly, it just doesn’t make sense,” Lacinda told 9News.

“This is not something that happens in real life and I just think, ‘Why was my poor father caught up in this?

“No one should have to receive a phone call [saying] that their father has been murdered overseas and still just be so in the dark.”

Brittany gripped her sister’s hands as tears streamed down her face. The sisters are trying to bring their father’s body back to Sydney for his final goodbye.

“I’m angry, I’m really angry and I’m scared and I don’t want this to happen to anyone else,” she said.

David Fisk and wife Lucita Barquin Cortez (left) with family. Photo: Supplied

Philippines police said the suspect claimed to have randomly barged into the victims’ room at The Lake Hotel in Tagaytay city, south of Manila, because the window was open.

Sydney man David Fisk, wife Lucita Barquin Cortez, 55, and Cortez’s daughter-in-law Mary Jane Cortez, 30, were found bound and gagged last Wednesday, July 10.

Their bodies were sprawled on the floor in the street-level room, Tagaytay Mayor Abraham Tolentino said.

Police say the suspect, who turned himself in on Wednesday, had killed the three guests as payback to the hotel for sacking him.

The man had been employed as a pool cleaner but was dismissed in March after he was linked to a robbery in one of the rooms.

Tagaytay police chief Charles Daven Capagcuan said at least three hotel employees identified the suspect from CCTV footage of him leaving the murder room.

The security cameras showed a part of his face when his mask slid down.

The identification and information from witnesses eventually led authorities to the suspect’s Batangas home province near Tagaytay, where he decided to surrender on Tuesday, the police chief said.

The unidentified suspect in the triple killings was paraded for the media on Wednesday. Photo: AAP

Fisk and his wife were at the end of a short Asian holiday and had been due to leave the Philippines on the day they were murdered.

Lacinda said their father had a “wicked sense of humour” and was deeply loved.

“I just pray for some answers and I just pray for Dad … to get home on Australian soil soon, and I just pray that he knew how loved he was by his sister, family and extended family because it’s just been horrific,” she said.

“We won’t stop fighting until we find out why, and we won’t stop fighting until we have justice for our father and Lucita.”

Lacinda said she learned about the developments in the case through media reports and had to call DFAT to confirm that a suspect had been found.

“I understand that there’s obviously a due process, but it just didn’t seem right. It doesn’t seem fair that we’re having to continually push for these answers when you would hope that they would want to help us.”

Tolentino and police officials presented the handcuffed suspect, who was wearing a hoodie, dark eyeglasses and a face mask, at a media conference on Wednesday.

The man, whose name has not been released, will face criminal complaints for the killings and robbery, Tagaytay police chief Charles Daven Capagcuan said.

The mayor repeated an apology to the victims’ families and to Australia for what he called the senseless killings.

“We are pleased to present to you the main suspect in this brutal crime and as promised that within a week, we will resolve and give justice,” Tolentino said, without identifying the victims as requested by their families.

In a South-East Asian country where many criminal suspects evade arrest for months or years, Tolentino commended police for rapidly identifying and locating the suspect, who was then apparently pressured to give up.

The man acknowledged taking Fisk’s watch and shoes after attacking him with a knife and suffocating Barquin Cortez, and her daughter-in-law, Capagcuan said.

“He barged randomly with a knife into the room because its window was open,” Capagcuan said.

Barquin Cortez and Mary Jane Cortez will be buried in their family’s home province in the Philippines while Fisk’s body would be flown home to Sydney, Tolentino said.

Tagaytay is popular among local and foreign tourists who flock there for its cool weather and to view one of the world’s smallest active volcanoes in a lake from elevated ridges teeming with restaurants, viewing decks and hotels.

-with AAP