Parents are demanding the truth of what really happened to the 43 missing students that disappeared in late September.

Maria Telumbre does not believe that her 19-year-old son, Christian, was burned in a fire along with the other students.

"How is it possible that in 15 hours they burned so many boys, put them in a bag and threw them into the river?" Telumbre said to the Miami Herald.

"This is impossible. As parents, we don't believe it's them."

Her husband Clemente Rodriguez also does not believe that the missing college students were incinerated by gang thugs in a giant funeral pyre in less than a day.

The family does not believe that the discovery of charred teeth and bone fragments belong to the students just like the bodies dug up in Guerrero state did not.

The students' parents thinks that the official account of what happened to the students is just another lie from an administration to cover up the lack of control it has over drug cartels, corruption and impunity.

"They are hidden somewhere," insists Clemente. "I hope that they're going to let them go any day now."

Last Friday, Mexican politician Murillo Karam said that all the students were dead.

It has been reported that the group of students were hauled to the neighboring town of Cocula in dump trucks, so tightly packed that 15 died by suffocating on the way. The rest were killed and their bodies were burned for 15 hours and then placed in bags and tossed into a river.

The students were last seen in the custody of Iguala police after finishing a fundraiser for the Rural Normal School of Ayotzinapa.

The Rodriguez family searched high and low for their son. Authorities could not extract DNA for identification so remains were sent to a lab in Austria for better results.

Guerrero's economy is fed by cultivation of heroin and marijuana making it a dangerous state.