The beating happened in Argentine Township, according to police, at an apartment on Harper Street.
The child was taken to Hurley Medical center where he died.
The boyfriend of Dominick's mother is being held in connection with the beating death.
Dominick's grandparents say neighbors and friends should be aware of abuse situations and call authorities, if necessary.
"It's going to haunt me. It's going to haunt all of us, I guess, because we didn't make sure everything's OK," Dominick's grandmother Julie Baker said.
Grandfather Martin Baker said he was shocked when he arrived at the apartment last weekend to see Dominick and his mother beaten. "The best thing for people to realize is, you know, if you hear any noises or anything at all, you need to call somebody, especially if you suspect it."
Family members say the beating of Dominick was severe, officials at Hurley's Trauma Unit tell them they have never seen anything like this.
Both Dominick's mother and her boyfriend were originally taken into custody. The mother has been released.
Prosecutor David Leyton says he will announce Thursday who will be charged and what charges will be brought.
Leyton does confirm the suspect in the beating was arraigned on separate drug charges today (Tuesday). Those charges include delivery of marijuana to a minor and possession with intent to deliver marijuana.
To help you can contact the Dominick Calhoun Fund, c/o Fenton Freedom Center. PO Box 52, Fenton, MI, 48430.
