Can spit and sweat free an innocent man from prison? Stephan Cowans was accused of shooting a police officer. Did the evidence add up? The jury thought so. Now Cowans is in jail -- and on a mission to prove his innocence. Follow the experts as they: gather evidence; collect DNA; compare DNA profiles; reexamine the case. Provided by publisher.

Includes index.

Case closed? : a jury hands down its verdict. Has the right man been convicted? -- Crime scene investigators -- DNA on the case : DNA evidence can lock up the guilty, and free the innocent -- The world's smallest Instruction manual -- Questionable evidence : the Innocence Project takes the case -- DNA dos and don'ts -- Not guilty -- Testing, testing : can Stephan Cowans prove his innocence? -- Justice, and an apology -- The police take another look at the fingerprint -- DNA Database.