== Dubious statement == 

 "English serial killer Peter Sutcliffe, the "Yorkshire Ripper", was arrested in Sheffield, ending one of the largest police investigations in British history." 

 This is a rather ridiculous statement.   Why do you think it takes up to two years to bring murder cases to court ?   A large amount of "police investigation",  finding witnesses,  scientific testing of evidence, etc,  occurs after the suspect has been arrested.  An arrest certainly does not "end the police investigation".  It may well end "the police man-hunt",  but if that is the case,  then that it what the article should say.