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.