Read Fasteddies's comment that Hawaii brags about reduced crimes being committed and one reason might be to count at least one murder as just an assault.  No one is even denying Tosaga stabbed Oliveiros many times only that no one one knows which stab wound caused Oliveiros death.  Also what is the point in mentioning that Oliveros supposedly had bipolar disorder?  If someone has a mental problem, does that mean that they might be more likely to cause problems to others and therefore more understandable why they would get beat up or stabbed because they had been asking for it?