The body of a small boy found in a dumpster Tuesday morning is that of missing 2-year-old Frankie Gonzales, a boy reported missing Monday and the subject of a statewide Amber Alert, Waco police say. The boy's mother has been arrested and charged in the case.

Gonzales' mother, Laura Sanchez, called 911 and reported her son missing Monday at about 1:53 p.m., saying he was last seen at a splash pad at Cameron Park. She said she turned away briefly, looked back and he was gone.

First responders searched the nearby Brazos River and used bloodhounds to search the park, but the hourslong search came up empty.

Waco police said during a news conference Tuesday afternoon that the boy's mother apparently confessed her involvement in the boy's disappearance to family members who then called police.

During an interview with investigators overnight, Waco police Officer Garen Bynum said the boy's mom "may have broke a little bit" and that she then told investigators where they could find the child's remains.

Investigators then went to a dumpster found on church property near the intersection of North 27th Street and Alice Avenue and found the boy's remains.

Bynum said the boy's exact cause of death is not yet known, but what they can prove is that the mother injured her child and that he did not die of natural causes. The boy's mother has been charged with first-degree felony injury to a child.