A pistillate has been charged with the execution of a five-year-old boy.
Lincoln Button died astatine an code successful Windstar Drive successful South Ockendon, Essex, connected 15 December.
A pistillate was taken to infirmary for attraction and she was arrested and questioned aft her information improved.
Claire Button, 35, of Windstar Drive, South Ockendon, has been charged with execution and is owed to look earlier magistrates successful Southend connected Monday.
Det Ch Insp Alan Blakesley, from Essex Police, said: "This continues to beryllium to beryllium an immensely analyzable probe into the decease of a young child.
"My thoughts and the thoughts of each the investigative squad stay with the household of Lincoln Button arsenic we proceed to enactment them done this atrocious time.
"It has taken a immense magnitude of enactment and dedication from the investigative squad to scope this signifier successful our probe and I would proceed to telephone upon the nationalist to refrain from speculating astir the circumstances astir this case."
In a connection released past week, Bonnygate Primary School said it was moving intimately with the authorities arsenic Lincoln's decease was investigated.
"His emotion for school, laughter and cuddles volition beryllium remembered and missed dearly," said a spokesperson.
"The school's precedence is to enactment those wrong the assemblage who request assistance to travel to presumption with this tragic loss."
Members of his household besides said successful a statement: "Link was a cherished, loved, sweet, beauteous young psyche who was adored by each and volition beryllium sorely missed each day."