[originaltext] Four American teenagers, all children of U.S. military person

Four American teenagers, all children of U.S. military personnel, have been arrested on charges of attempted murder after a woman was knocked off her motorbike, Japanese police said. The four suspects—two 15-year-old boys, a 17-year-old girl and an 18-year-old man—were controlled on Saturday, the Tokyo Police Department said. They are charged with causing a serious head injury to a 23-year-old restaurant employee. U.S. Forces in Japan was informed of the August incident in late October, a public information officer said. There was no clear explanation for the delay in handing the suspects to police, other than it involved rules between Washington and Tokyo covering U.S. Forces and their dependents in Japan. The U.S. military presence and its impact on Japanese residents have been a trouble over the years.
3. What do we know about the victim according to the news?
4. When were the suspects arrested according to the news?