It is not the ideal of journalism to uncritically accept anything government employees say, as the truth. Unfortunately, since journalists often have to be friendly to those employees to find out juicy news items, they often forget all noble ideals.
I have been involved as an observer, a blogger, or an adviser in cases where people have been charged with rape or child molestation, including the Tonya Craft trial (she was acquitted) and the infamous Duke Lacrosse Case (in which the charges were dropped after North Carolina Attorney General found “no evidence” that a rape or any other crime had occurred). There also are others and if I have found one common thread in all of them, it has been the role of the mainstream news media. With only very, very few exceptions, the pack mentality of mainstream journalism has come to the fore and journalist after journalist has written or broadcast stories that assume that charges automatically mean guilt.