A Texas woman faces federal charges after Austin police say they found $2 million worth of liquid methamphetamine in her car as she was traveling to Dallas with her 4-year-old daughter last week.

Officers made the discovery after pulling over the driver, identified by police as Seline Ayala, 22, of Laredo. Police said she was driving her Dodge Avenger 5 mph above the 60 mph speed limit in the northbound lanes of the 5400 block of Interstate 35 around 11:20 p.m. July 12.

According to court papers, the Laredo resident provided police with a series of evolving answers when asked why she was traveling to Dallas: First, she said she worked for a doctor and was traveling to Dallas for a meeting, but could not provide its location or provide the name of the doctor who employed her, officers recounted in an arrest affidavit.

She also told the officers she was taking the drugs to Dallas at the behest of a man in Laredo, the affidavit said.

Ayala initially refused to allow officers to search the car, so officers brought in a narcotics unit dog, who indicated that drugs were in the vehicle, police said.

Three large white jugs, labeled "Purple Power," contained 75 pounds of liquid meth worth about $2 million, Austin police said.

Along with the drugs, Ayala was traveling with a San Antonio woman, who was babysitting Ayala’s 4-year-old daughter, the affidavit stated.