A Chico man is sentenced for the alleged murder of his mother. 30-year-old Adam Jacob was sentenced Wednesday to 26 years to life in prison for the death of 56 year-old Donna Teifer back in 2012. The sentence includes 25 years to life for first-degree murder and an additional year for Jacob's use of a knife during the incident at Teifer's Hampshire Drive house in Chico. DA's Office said Jacob meant to kill Teifer because he felt his mother betrayed him regarding a child custody issue involving Jacob's son. The defendant told others he wouldn't mind if Teifer died.