A 22-year-old man was arrested Tuesday for allegedly causing his girlfriend's baby serious injuries by hitting the boy's head against the floor in his house in western Japan, police said.Katsuhiko Hosokawa admitted to the charges and police suspect he might have been abusing the 1-year-old baby on a daily basis. The baby was hospitalized but remains in critical condition.According to the police, Hosokawa is suspected of grabbing the child by the face, pulling him down from a baby chair and pounding his head against the floor on Saturday evening at the suspect's house in Marugame, Kagawa Pre…READ FULL ARTICLE