You can hear the frustration in the 911 dispatcher's voice.
"Ma'am, what is your address?" he asks a woman who has just called to report that she and her sister have been shot. The few details she can provide are muffled by her own sobs of pain.
"I'm dying," the women says with a groan.
LISTENER DISCRETION STRONGLY ADVISED. Click "here" to listen to the first 911 call.
In the one-minute call, the voice fades in and out as the dispatcher and Irving Texas Fire Department rescue personnel desperately try to determine where the call is coming from.
Then, the line goes dead.
It's the last time anyone hears from Sarah Yaser Said, 17, or her sister, Amina Yaser Said, 18.
Officials spend the next hour tracking the cell phone signal to a general area and then a second call comes in.
An hour later, at 8:30 p.m. New Year's Day, an employee at the Omni Mandalay Hotel calls 911 to report a taxi in the hotel's cab queue with no driver and a body slumped in the passenger seat and another in the backseat.
Click "here" to listen to the second 911 call.
The caller remains composed during the 3½-minute call, explaining in careful detail the scene until police arrive.
"One of the people in the passenger seat looks like she's hunched over and she has blood coming from her ear," the unidentified hotel staffer tells the dispatcher. "I'm not sure what the state is and don't want to necessarily touch the car."
The dispatcher keeps him on the line, and he describes an orange taxi, provides a license plate number and tells the woman that he did not hear any gunshots. He also says that the hotel does not have cameras trained on the taxi stand area.
"It doesn't look like they're alive to us," the employee says before hanging up as an officer arrives.
At the scene, police find the sisters dead and abandoned in a cab that is quickly traced to their father, Yaser Abdel Said, a 50-year-old Egyptian-born cabdriver.
Both girls had been shot multiple times.
Yaser Abdel Said has been on the run from Texas authorities since that night. Police say that he may have fled the country and that they they believe he is armed with a handgun.
"As far as I know, there haven't been any sightings of him," Officer David Tull, spokesman for the Irving Police Department, told ABC News.
The sisters were buried earlier this month after family and friends held a candlelight vigil to memorialize the teenagers, who have been described as popular students at Lewisville High School and inseparable siblings.
At those ceremonies, their mother, Patricia Said, called for Yaser Abdel Said to turn himself in to authorities. Their 19-year-old brother, Islam Said, who said his father "messed everything up," tried to separate the family's Muslim faith from the crime. The mother and son have largely remained in isolation since the girls' burials.
Speculation continues about the two young women possibly falling victim to their father's rage in an "honor killing" provoked by the Muslim teens' Westernized behavior, including relationships they may have had with non-Muslim boys.
Some of those family dynamics emerged last week in an investigative story in the Dallas Morning-News that chronicled what it called a history of abuse allegations in the Said family, many of them tied to clashes between the girls' Western culture and the strict Middle Eastern culture that Yaser Abdel Said grew up in.
Yaser Abdel Said, who immigrated to the United State in 1983 and was granted citizenship in 1997, reportedly traveled to Egypt often before the shooting.
The allegations began in 1998, when the girls, still children, accused their father of sexual abuse in Hill County, Texas, according to the Morning-News account. Patricia Said reportedly signed an affidavit swearing the allegations were true, but the charges were later dropped after the girls recanted and said they had made up the story because they wanted to live with their grandmother.
Connie Moggio, Patricia Said's sister, told the Morning-News that her sister met Yaser Abdel Said when she was just 15 and that one time he had shot out the tires on her car to keep her home. Fellow students described their classmates arriving to school with injuries consistent with abuse, the paper reported. One student even described a story Amina Said had told him about her father walking into her bedroom waving a gun.
In December 2007, Yaser Abdel Said reported his two daughters and their mother missing to the Lewisville Police Department. According to a police report, the next day, Patricia Said called police to say that she and the two teens were safe but that "she was in great fear for her life" and that concern for their well-being prompted the three women to run. The missing persons' case was closed. "We were able to verify that their welfare was no longer in question, so we closed that report out," Capt. Keith Deaver, a spokesman for the Lewisville police, told ABC News.
The three reportedly returned to Lewisville on New Year's Eve, the day before the fatal shooting.
On a Facebook page devoted to the teens' memories, friends continue to post comments and images, some showing hallways at Lewisville High School plastered with tributes to the murdered classmates. A video has also been posted about women of Arab descent who are victims of violent crimes by men.
In Canada last year, religious tension may have played a role in the murder of Aqsa Parvez, a 16-year-old who police say was strangled by her father, Muhammad Parvez, also a cabdriver. Part of that dispute reportedly had to do with the teen's resistance to wearing a traditional "hijab" or a head scarf.
Authorities have an arrest warrant for Yaser Abdel Said on two capital murder charges and are now working with state and federal investigators to find him. A $10,000 reward was offered earlier this month for information leading to his indictment.
Yaser Abdel Said is described as 6 feet 2 inches tall, with black hair and brown eyes.