A Houston mother was jailed late Wednesday after she allegedly tried to hide drugs on her 18-month-old child during a traffic stop in Wasilla, according to Alaska State Troopers.

The woman, 29-year-old Amy L. Padie, sped past investigators at a serious head-on collision Wednesday night at Bogard Road and Seward Meridian Parkway, troopers said. The wreck between a sedan and a pickup trapped the car's driver for a time, before rescuers cut away parts of the car, pulled the woman out and flew her to an Anchorage hospital in a helicopter.

The crash victim was listed in fair condition Friday at Providence Alaska Medical Center.

According to a charging document, Padie accelerated as she drove through the crash scene just before midnight in a maroon Plymouth Neon sedan. She didn't slow down or move over when a trooper tried to signal her, the charges say.

A trooper pulled over Padie's car and immediately noticed that she seemed impaired. He wrote in the charges that there was a young child in a car seat. Padie failed field sobriety tests and her pupils were large, then small again, with no change in the light, the charges say. Padie admitted to snorting a crushed Vicodin pill before driving, the trooper wrote.

"I noticed she changed from acting excited and restless to being 'on the nod' and lethargic," the charges say. "Padie displayed behaviors and general indicators consistent with use of both a (stimulant) and a (painkiller)."

The trooper waited with Padie while someone came to pick up the car and take home the 18-month-old. He allowed her to comfort the child at one point by giving it a bottle, the charges say. While consoling the infant, Padie opened a pink case and put a meth pipe behind it, then threw the pipe off the road when the trooper noticed. The trooper said he told Padie to put the child back in the car seat and watched her shove something under the child's shirt. As he tried to arrest Padie, she wriggled away and grabbed at the infant, according to the charges. A trooper sergeant helped put handcuffs on her.

Under the infant's shirt was a green pouch holding what looked like heroin and methamphetamine and other drug paraphernalia. The trooper field-tested the substances and confirmed his suspicion, the charges say.

Troopers had Padie's blood drawn for later testing.

She was charged with driving under the influence, endangering a child, possessing drugs, tampering with evidence and resisting arrest and held on $15,000 bail.

Reach Casey Grove at casey.grove@adn.com or 257-4589.