Police served a fresh arrest warrant Friday on the former head of a nursery school in Kagawa Prefecture on suspicion of inflicting bodily injury that caused the death of a 14-month-old boy.
Police said Katsuyo Tani, 60, trampled on the head of Hitoki Fujishima on Feb. 19 after he refused to go to sleep.
After standing on the back of the boy's head, Tani noticed that he was unconscious and rushed him to a nearby hospital, where he was confirmed dead shortly afterward, investigators said.
Tani was initially arrested April 12 and later indicted on suspicion of hitting a 5-year-old girl on the head at the nursery school sometime between Oct. 28 and Nov. 2. The girl later left the school.