Steven Bradley Collins and his 2-year-old daughter RyLeigh Collins were killed in a car crash. Then police realized the family had a child missing for months

Alabama authorities are searching for a 1-year-old boy whose months-long disappearance only came to light after members of his family were killed in a car crash. 

Kahleb Rowan Collins, 1, was last seen on Sept. 4 in Winfield, Ala., according to an alert from the Alabama Law Enforcement Agency (ALEA). 

Law enforcement had been unaware that he was missing until his parents and 2-year-old sister were involved in a fatal crash on Dec. 8 near Glen Allen, about 70 miles northwest of Birmingham, the Fayette County Sheriff’s office said in a press release.

The child’s father Steven Bradley Collins, 40, and 2-year-old sister RyLeigh Collins were killed in the crash, per the sheriff’s office. Wendy Jean Bailey, identified as the children’s mother, was hospitalized and remains in critical condition. 

On Wednesday, Dec. 11, the children’s grandfather John Elton Bailey was arrested and charged with failing to report Kahleb missing, the sheriff’s office confirms to PEOPLE.

According to a criminal complaint reviewed by WBMA and AL.com, the missing child is believed to have “suffered serious bodily harm or death.” He is believed to have been “removed from the home and taken to an unknown location,” the outlets report.

Kahleb Rowan Collins. Alabama Law Enforcement 

The child’s father was allegedly driving in the rain at twice the speed limit when the crash occurred, WBMA, AL.com and WBRC reported, citing an Alabama Uniform Traffic Crash Report. 

Reportedly, none of the occupants were wearing seatbelts.  One passenger was ejected from the car, per the report.

Police soon realized the family’s 1-year-old had not been present in the car at all, prompting a search. On Monday, Dec. 18, ALEA confirmed the child has not been seen for more than three months and asked for the public’s help in locating him.

A neighbor of the family told WWMT that they were aware the couple had a son, but never saw him. A few months ago, the parents reportedly told the neighbor the child was sick and had been sent to a relative’s house. 

In a Facebook post on Nov. 6, Steven said his son was unwell, with a “long tough road ahead” for recovery. 

“He is not growing and has major back issues. His organs are growing but not his body. He has to have surgery at some point,” Steven wrote. 

RyLeigh Denise Collins. Riser Funeral Homes

In an obituary for RyLeigh, she is being remembered as a “loving and happy baby” who enjoyed fishing with her family and watching Paw Patrol, and loved Mickey and Minnie Mouse.

“RyLeigh brought so much joy to her family. She will be remembered always and her memory cherished,” the obituary read.

It wasn’t immediately clear if John, the children’s grandfather, has entered a plea or retained an attorney to speak on his behalf.