In a correction issued Wednesday morning, Colorado State Patrol retracted the previously stated cause in a double fatal crash that occurred on New Year’s Day on U.S. 36 at Lefthand Canyon Drive.

In the release, the department said initial information at the scene indicated fatigue may have been a contributing factor. However, no definitive cause has been determined, and the case remains under investigation.

CSP confirmed in the update that a Jeep heading north on U.S. 36, driven by 43-year-old Joshua Gilson, drifted out of the travel lane through the center grass median before rolling and coming to rest in the southbound lanes of U.S. 36. Gilson and Christina Gilson, 43, died in the crash, according to the Boulder County Coroner’s Office. Christina Gilson was not wearing a seatbelt at the time of the crash, according to CSP.

Their children, ages 11 and 16, were in the car during the crash and suffered moderate injuries. A dog, also in the car, was taken to a local vet and put down due to the extent of its injuries.

On Wednesday, CSP Sergeant Patrick Rice wrote in an email that investigators are going through a list of possible causes that might explain the vehicle drifting out of its lane and hitting the median. Rice wrote that until the investigation is complete, all causes will be considered.

“Causes can be numerous and sometimes specific causes are never fully determined,” Rice wrote in the email.

In the release, CSP apologized to the family and friends of those impacted by the incorrect statement about the cause of the crash.A friend of Joshua and Christina Gilson confirmed with the Daily Camera that the children are staying with relatives.

Those interested can help the Gilson family through their Meal Train web page. According to its website, Meal Train is a way to organize a schedule for family and friends to deliver home-cooked meals to someone who is going through a challenging time.