John Amos 'Neglect of Care' Case Closed By LAPD

The investigation into allegations of neglect regarding John Amos' care has been closed ... 'cause cops tell TMZ there was nothing they found that suggested wrongdoing. Law enforcement sources tell us detectives spoke to the parties involved and determined no crime had been committed -- or at the very least, there wasn't enough evidence. We're told cops concluded the entire ordeal stemmed from an ongoing family…