LOUISVILLE, Ky (WDRB) – The stepfather of a murdered 14-year-old will face a kidnapping charge in Madison, Alabama.

Kentucky State Police and LMPD issued an Amber Alert Thursday night at the request of a Jefferson County judge, believing Joshua Gouker's 15-year-old son was in danger. Authorities did not realize they had been arrested in Alabama.

Gouker's stepson Trey Zwicker was murdered a month ago. High school students found Trey's body behind Liberty High School on May 11th. An autopsy report released just minutes before the Amber Alert shows Trey died of "multiple blunt and sharp force injuries."

Madison police say Gouker, his son, Joshua Young, and Jahaira Riddle approached a woman in a Huntsville motel parking asking for a ride to the bus station Wednesday morning. When they stopped at a gas station in Madison, she says Gouker pulled out a gun and demand she drive an hour and a half to Birmingham. She dropped them off at the Rodeway Inn in Homewood, AL, just outside of Birmingham. The woman called Madison police and authorities issued a kidnapping warrant.

Homewood police tracked the three to the same hotel on Thursday and arrested all of them on firearms charges. Young was taken to family court while Gouker and Riddle are in the Homewood city jail. Hours later, KSP issued the Amber Alert for Gouker and Young.

Madison police say once the firearm charges are taken care of, Gouker will be charged with kidnapping.

Gouker also has two other outstanding warrants in Kentucky and Indiana. Louisville Metro Police say Gouker will not face any charges stemming from the Amber Alert. A spokeswoman says Gouker committed no crime when he left the state with his biological child.

Trey's grandmother, Shelly Stewart, tells WDRB she believes Gouker knows Trey's killer. Trey's mother, Amanda Campbell, filed an EPO against Gouker, saying he's a suspect in Trey's murder. "As soon as my daughter left him, we knew he was going to run," says Stewart. "We started contracting social services and started saying he's going to run with that kid, he's going to run with that kid."

Metro police have not named Gouker or any other person a suspect in Trey's death.