A young girl is a suspect in the death of an infant at a Michigan daycare.

Muskegon Police Chief Jeffrey Lewis told WZZM 13 that Korey Brown, who is only one year old, was found dead at the Keysha Keepers Daycare when his mother went to pick him up, along with two other children.

While at least one adult was there at the time was well as four other children, police are reportedly eyeing an eight-year-old child as a suspect, with a five-year-old child said to be a witness to the incident.

Bryanna Reasonover, the mother of the infant, told the Detroit Free Press that she had dropped her children off at the daycare so that she could go to work. However, when she returned to pick up her children, she found Korey unresponsive in a playpen.

She also claimed that Korey had bite marks and bruises on his face and fingers.

“It’s very frustrating to not know what happened, to know he was suffering when all he probably wanted was his mommy,” she said.

According to police, it is believed that the children were left alone for an unspecified amount of time and that the young girl had stepped in when Korey started crying. It is unclear whether she meant to kill the baby or not.