text: A Utah man confessed to stabbing his ex-wife to death on Wednesday when he called 911 and turned himself in. Spencer Gerlach, 20, told police that he and his ex-wife Keltsie Gerlach were having a dispute on Wednesday afternoon that escalated into murder. The topic of their argument is not yet known. Chief Mike Nelsen, Brigham City Police Department told Fox that when police arrived, Keltsie was found dead in the living room with stab wounds. Scroll down for video . Confession: Spencer Gerlach, 20, told police that he and his ex-wife Keltsie Gerlach were having a dispute on Wednesday afternoon that escalated into murder . Tragic murder: Keltsie Gerlach was found in the living room stabbed to death as her 15-month-old baby girl (right) was sleeping in the next room . The couple's 15-month-old daughter was unharmed in her crib and was asleep in the next room. The baby was taken by the Division of Child and Family Services. The couple were recently divorced and Keltsie lived in her Utah apartment alone with her daughter. It's unknown as to why Spencer was at her residence on Wednesday. Cache Valley Daily reports that Investigators interviewed Gerlach on Wednesday nightand are unsure of his motive for killing Keltsie. There were no indications inside the apartment that the couple had been fighting or struggling. A large knife at the scene and is believed to be the murder weapon. The victim’s body was sent to medical examiners to determine how many times she was stabbed. Spencer faces first-degree murder charges and was booked at Elder County Jail. Once in love: The couple, pictured in happier times, were recently divorced and Keltsie lived in her Utah apartment alone with her daughter . Tuned himself in: Spencer Gerlach told police he stabbed his ex-wife Keltsie Gerlach during an argument . Father: Spencer Gerlach, whose 15-month-old baby slept as he allegedly murdered his ex-wife, has been charged with first degree murder .
target: Spencer Gerlach, 20, admitted to stabbing his ex-wife Keltsie Gerlach to death as their 15-month-old daughter slept in the next room .
  The baby girl was unharmed and was taken into custody by Child Services .
  The cause of argument that led to the murder is unknown .
  Spencer faces first-degree murder charges and was booked at Elder County Jail .