Blood
Some are squeamish about the word, the sight, the smell of this life giving fluid.  Are you? 

Blood can tell a forensic specialist so many things, whether the victim, witness, or suspect can talk for themselves or not.  Splatter reveals positions and speeds.  Tests help define the person.  Careful collection not only ensures good evidence but also prolonged freedom from contamination of the handler (one who collects it).

Read each section carefully to find the multitude of tales that blood can tell.