Sound

For our film we might need the use of some sounds to make it seem a lot more realistic and to make it look more effective.
The use of police sirens when the killer is being chased down the road could be used to create more suspense and to make it seem a lot more real:
http://www.freesound.org/samplesViewSingle.php?id=62878
The use of telephones ringing when in the police station to make it seem more busy and life-like:
http://www.freesound.org/samplesViewSingle.php?id=20069
When the ring falls into the pool of blood, a hyperbolic sound can be used to make it seem more dangerous and horrific then it would be if it just fell:
http://www.freesound.org/samplesViewSingle.php?id=44203