Police allege Niels Hoegel killed at least 86 people
                                
                                
                                    (Newser) -
                                    He has been convicted of killing two and attempting to murder two more—and he could actually be "Germany's worst post-war killer," reports the  BBC . Niels Hoegel, 40, was sentenced to life in prison in 2015 for those crimes, but prosecutors voiced their belief that the nurse...