A mother and her 22-year-old boyfriend have been sentenced to prison for involuntary manslaughter after authorities say her 3-year-old son fatally shot himself in their Detroit apartment.

WDIV-TV reports 20-year-old Kinesha Boyd was sentenced to two years in prison on Wednesday and Demetrius Peals was sentenced to four to 15 years in prison. Court records show they earlier pleaded guilty to charges including involuntary manslaughter.

Investigators have said they believe that Kyrei Boyd found a loaded handgun while in Peals' care in December and shot himself in the face. The child later died at a hospital. Police said Peals left the apartment after handing the wounded child to emergency workers.

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Information from: WDIV-TV, http://www.clickondetroit.com