Dad is identified as JONATHAN JOSEPH COLBY.
http://www.mlive.com/news/grand-rapids/index.ssf/2015/03/allegan_man_now_charged_with_m.html
Father now charged with murder in death of infant with cracked skull
By John Tunison
on March 24, 2015 at 12:58 PM, updated March 24, 2015 at 1:22 PM
ALLEGAN, MI -- A 22-year-old Allegan man is now charged with murder after his 3-month-old son died in December from what police allege was abuse.
Allegan County prosecutors recently added charges of open murder and felony murder in the case against Jonathan Joseph Colby.
He initially was charged with first-degree child abuse after the child died Dec. 3.
The case had been on hold pending the results of a psychiatric exam.
Earlier this month, Colby was found competent to stand trial.
Allegan County sheriff's detectives say a medical examiner determined his son, Jase, suffered a cracked skull and injuries consistent with strangulation and suffocation.
In an interview with detectives, Colby admitted to hitting, slapping and choking Jase on several different occasions, including the night that Jase died, detectives said. Colby allegedly hurt his son because he was tired and frustrated.
An April 14 probable cause hearing is scheduled for Colby in Allegan County District Court.