The baby was found unresponsive after police were called to a home on Feb. 11. The baby was taken to a local hospital.
Court records reportedly show that an intention to assert an insanity defense was filed in Genesee District Court on Tuesday.
Robinett will be sent to the Michigan Center for Forensic Psychiatry to see if he is competent to stand trial, documents show.
Leyton said Robinett was left alone with the baby after the child's mother went to work. It appears to be reportedly a case of shaken baby syndrome, the prosecutor added.
"Doctors are referring to him as a miracle baby," said Leyton. "At first, they weren't sure he was even going to live."
To Read More on this Story: Click Here
If you have any questions or concerns about what can be done to help babies who have been shaken, or families of babies who have died, please call Christopher Keane and The Keane Law Firm toll-free for free consultation at (888) 592-5437 (KIDS), click on contact us here, or use the web form provided at http://www.keanelaw.com