KENTWOOD, MI -- A 9-year-old boy stabbed in the back Monday night at a Kentwood mobile home park has died, police say.

Michael Connor Verkerke was playing with three other children on a playground at the Pinebrook Village mobile home park around 6 p.m. Aug. 4 when a 12-year-old pulled out a knife and repeatedly stabbed him, Kentwood police say.

Pinebrook Village is located in the 400 block of Bellewood Street SE.

Verkerke ran back to his residence where he collapsed on a porch and paramedics were called. He later died at a local hospital.

Around the same time, the suspect called 911 to turn himself in to police.

The child used the phone of Glen Stacy, who was doing yard work nearby, to make the phone call.

Stacy recalled the child saying, "I just stabbed somebody. Please pick me up."

Stacy said the boy was calm and walked up to police for his arrest. He told dispatchers he had taken pills and made statements about wanting his life to be over, Stacy said.

The boy was taken to a local hospital for evaluation and then transported to the Kent County Juvenile Detention Center pending formal charges, police say.

"We are still investigating and trying to determine a cause for this tragedy," police said in a statement.

An autopsy will be performed by the Kent County medical examiner.