Alabama prosecutors filed a motion on Wednesday asking for more time to investigate the disappearance of a 2-year-old boy who was last seen in September.

WABM reported that Kahleb Collins’ mother and grandfather, Wendy Bailey and John Bailey, 22 and 50, have a preliminary hearing for March 11. However, Andrew C. Hamlin, the District Attorney for the 24th Judicial Circuit, requested — and was granted — a postponement as they prepare their case against the pair.

WABM reported that Hamlin’s request was approved, meaning the Baileys’ preliminary hearing is now scheduled for April 11.

READ: Mom Due in Court Amid Ongoing Disappearance of 1-Year-Old Son, Now Presumed Dead

Collins remains unaccounted for months after a December 8 crash that killed his father and older sister. Wendy Bailey, who was a passenger, was seriously injured in the wreck. She is charged with criminally negligent homicide for failing to have her daughter restrained in a car seat before Collins’ father veered off the road at 90mph and struck a tree.

Police believe Collins is dead, but he was not in the December 8 crash. Days after the crash, John Bailey was charged with failing to report Collins’ disappearance.

Authorities wrote that, on at least two instances, Wendy Bailey witnessed her son “being bound with rope, physically assaulted, and being bound by a rope from a loft with blood and bruising present.”

Kahleb Collins’ father allegedly sent Wendy Bailey photos showing their son hanging by a rope and bloody. The father reportedly wrote that he wanted to kill the toddler and he was not moving. He later texted Wendy Bailey that their son was moving.

In addition to aggravated child abuse and domestic violence, Wendy Bailey is charged with abusing a corpse as investigators believe her son’s body was put in a bag and stashed in a storage building. His body was eventually discarded at an unknown location, authorities suggested.

John Bailey remains jailed on a $100,000 bond, while Wendy Bailey’s bond was set at $1.9 million.

[Feature Photo: Alabama Law Enforcement Agency]