PROVO -- A 21-year-old American Fork man was sentenced Monday to life without a possibility of parole for killing his infant son in April.
The Salt Lake Tribune reports Joshua Petersen received the maximum sentence after acknowledging to killing his 5-month-old son, Ryker.
Police say Petersen placed his son on a sofa and shot him in the head on April 5 in his home. Petersen then tried to kill himself before a family member intervened.
Petersen accepted a plea deal in September.
Investigators said Petersen plotted for a month to shoot his son. Members of his family said he suffered from lifelong depression.
Petersen's attorney says Petersen was not thinking clearly at the time of the shooting.