The boy died at a hospital less than an hour after his mother called 911, saying he was “was unresponsive and not breathing,” police said.

Detectives took custody of Helena and Jamar Branch in connection with the death of their 16-month-old son, Benjamin.

The parents of a malnourished 16-month-old toddler who died at a Poway hospital last year were arrested Wednesday on suspicion of murder, San Diego police said. Jamar Branch, 39, and Helena Branch, 37,

Those findings were later confirmed as the result of his death after the child was neglected over a lengthy period of time, authorities said. Jamar and Helena Branch were identified as the parents of the child.

An investigation into the death of a 16-month-old baby last fall in Sabre Springs led to the arrest Wednesday of both of his parents.