Suspect Robert Pape was Rebecca Friedli's ex-boyfriend. All three teenagers had plans to go hiking the night she was found dead, but the two suspects said they changed their plans and did not see her at all.
Robert Pape and Cristin Smith were arrested for the second time on Friday after Jon Hayward, 55, and his long time girlfriend Vicki Friedli, 53, were found shot inside their burning home in 2006.
Friedli's 18-year-old daughter Rebecca was found in a wheelbarrow about 70ft outside the house, but her body was too badly burned for authorities to determine the cause of death.
The two men were first arrested for the murders in 2014 but a judge dismissed the case, citing an undisclosed 'legal issue'.
Becky was found burned in a wheelbarrow outside her house and her mom Vicki Friedli (above) and her long term boyfriend Jon Hayward (below) were found with gunshot wounds inside the blazing home.
On September 17, 2006, firefighters responded to a 911 call reporting a fire in Pinyon Pines, California, and arrived more than an hour after it started.
The blaze was finally extinguished and two bodies were both found inside the house.
Investigators believe Rebecca, known as Becky, was doused with gasoline in a wheelbarrow about 70 feet away from the house and set on fire first, according to grand jury transcripts cited by KESQ.
Gasoline was also poured on the house, with Friedli and Hayward's bodies found burned inside.
But Friedli died from a .40 caliber gunshot would to the head, and live-in boyfriend Hayward sustained a shotgun wound in the chest.
Pape, Smith and Becky had planned to go hiking the night of her death, but the two suspects said they changed their plans and did not see her at all.
Pape, who was Becky's ex-boyfriend, had spoken to her on the phone nine times in the 48 hours before her death, call records show.
The last call between Becky and Pape was made about two hours before her body was found.
Pape had been fired from his job at 6.30pm the night of the murders, and both he and Smith told police they tried to go to Mass at 7pm, an alibi corroborated by cell phone tower records.
The two told investigators they showed up late, so they went to James Workmen Elementary School to shoot a paintball gun instead.
But there was no evidence of their activity at the school, and their phones were either turned off or cut off from reception between 7.13pm to 10.34pm, a half hour after the fire was reported.
A search warrant for Pape and Smith's homes did not come through until 13 months after the murders.
DNA tests in 2007 linked one suspect to the crime scene, but the two weren't arrested until 2014.
Pape was indicted by a grand jury, and Smith, who was underage at the time, was ordered to stand trial.
All charges were dropped in 2014 due to legal issues during the proceeding against Pape, KESQ reported.
At a news conference on Friday, authorities said they were seeking justice after the case was 'mishandled'.
Authorities said they had gathered new evidence utilizing 'cutting edge technology' following a 16-month investigation.
Pape faces the death penalty and Smith could be sentenced to life in prison. Both are still held in custody.
Two men are charged with murder a decade after a family of three was found dead in remote California house fire
Robert Pape and Cristin Smith were arrested for second time on Friday
They were arrested in 2014, but judge ended up dismissing the case
Prosecutors believe they killed Jon Hayward, girlfriend Vick Friedli, and Friedli's daughter Rebecca Friedli, 18, in 2006
Rebecca was found burned in a wheelbarrow about 70 feet from the house
Hayward and Friedli were dead inside the house, each with gunshot wound
Authorities said new evidence emerged after 16-month investigation
By JESSICA CHIA FOR DAILYMAIL.COM
PUBLISHED: 23:35 EST, 13 June 2016 | UPDATED: 01:53 EST, 14 June 2016