DNA Sample from Saliva

0:00 in 1997 two women from Florida were

0:02 victims of sexual assault and robbery

0:03 one year later the police developed a

0:06 suspect plain-clothed police officers

0:08 monitored the suspect for months looking

0:10 for clues that would build their case

0:12 during surveillance the officer saw the

0:14 suspect spit on the street one of the

0:17 officers grabbed a napkin and collected

0:19 the spittle the saliva which contained

0:21 skin cells provided enough DNA evidence

0:23 to charge the man with the two attacks