wreck your brainies trying to solve this...

this is a really dumb one Korona-chan. how else was he ment to stop the recording if it ended after the gunshot. couldnt have been suicide

BUT NOT SO FAST THO what if the cassette was turned to the point it would only record for x seconds ?! usually a casette keeps playing until the end before it stops. THAT SAID THE POLICE WOULD HAVE HAD TO REWIND THE CASETTE TO LISTEN TO THE RECORDING! AND EVEN IF IT DID END THEY MUST HAVE FLIPPED IT FIRST BEFORE THEY COULD LISTEN TO IT !

OR THE MURDERER MUST HAVE REWINDED IT AS IT STATED THEY PRESSED PLAY WHEN THEY ARRIVED AT THE SCENE!