For what it's worth (and I would've hoped N-o-Rama to get this right in their post), police did not see the really threatening videos prior to the shooting -- for example the one saying "You will die next". Some of the material was released on the day of the shootings, i.e., after the interview.
It's easy to accuse this particular police man for mishandling this case. But you should get your facts right before doing so. What this man saw was not the threatening stuff, what he saw was just a seemingly normal guy practicing at a shooting range.
Furthermore, it's hard for any one police to cull out nutcases like this in interviews. Matti Saari fooled many other people as well, including the school principal and Matti's school friends, most of which thought Matti was just a normal boy and didn't feel he was in any way suspicious.
It's easy to accuse this particular police man for mishandling this case. But you should get your facts right before doing so. What this man saw was not the threatening stuff, what he saw was just a seemingly normal guy practicing at a shooting range.
Furthermore, it's hard for any one police to cull out nutcases like this in interviews. Matti Saari fooled many other people as well, including the school principal and Matti's school friends, most of which thought Matti was just a normal boy and didn't feel he was in any way suspicious.