In this subchapter:
(1) "Attorney representing the state" means a district attorney, criminal district attorney, or county attorney performing the duties of a district attorney.
(2) "Unsolved crime" means a criminal offense:
(A) that is an unsolved homicide or an unsolved felony that is one offense arising out of the same criminal episode as other unsolved felonies; and
(B) the investigation of which requires a level of expertise that is not readily available to local law enforcement agencies.