MANILA, Philippines ? (UPDATE 3) The wife of television news anchor Ted Failon died at the hospital on Thursday evening, a day after she was shot in the head inside their home in Quezon City, her attending physician said.

Trinidad Etong, 44, expired due to complications from penetrating cranial missile injury, or a bullet wound to the head, at the New Era General Hospital at 8:50 p.m., said Doctor Adonis Gascon.

Gascon told reporters that there was a ?less than five percent? chance for survival among patients who suffer gun shot wounds to the head.

Doctors tried to revive her for 15 minutes by applying electric shocks, he said.

The family was asked whether the doctors should continue with the emergency procedure, and they agreed to have it terminated upon seeing that the patient had ?flat-lined,?? Gascon said.

Earlier, at around 8:15 p.m., Delfin Lee, a friend of Failon?s, told reporters that doctors had started performing ??emergency treatment?? on Trina after a drop in her blood pressure.

?She took a turn for the worse at around 8:30 p.m. or earlier,?? Gascon said.

Etong expired shortly after police said they would no longer force Failon to go to the Quezon City prosecutor?s office for inquest proceedings.

Before she died, Etong?s relatives at the hospital refused to submit her to a paraffin test, said Senior Superintendent Franklin Mabanag chief of the Quezon City police Criminal Investigation and Detective Unit (CIDU).

A paraffin test determines whether or not there are traces of gunpowder on a person?s hand.

Failon, his sisters-in-law Mean and Pamela Arteche, and several house could face obstruction of justice charges for tampering with the crime scene and not reporting immediately that Etong had been shot, police said.

The Arteche sisters were brought to the Quezon City prosecutor?s office for inquest proceedings shortly before Failon?s wife died.

Failon claimed he discovered his wife bloodied inside their daughter?s bathroom on Tuesday.

The primetime news anchor underwent a paraffin test on Wednesday. The result was negative.

Mean Arteche went hysterical when informed of her sister?s death by telephone, saying she could not forgive police for taking them from her sister?s deathbed.

?Hindi ko kayo mapapatawad [I will never forgive you],? she told police. With reports from Thea Alberto, INQUIRER.net; Nikko Dizon, Dona Pazzibugan, Kristine Alave, and Julie Aurelio, Philippine Daily Inquirer