Criminal Offenses - As introduced, enacts "Matthew Davenport's Law," which creates a Class D felony offense of knowingly possessing Kratom; creates a Class B felony offense of knowingly manufacturing, delivering, or selling Kratom, or of knowingly possessing Kratom with intent to manufacture, deliver, or sell Kratom; punishes a violation of the offense as a Class A felony if the offense involved the delivery or sale of Kratom to a minor; requires toxicology tests in certain circumstances to include testing for Kratom; requires the commissioner of labor and workforce development to promulgate a rule to add Kratom to the definition of a drug in regard to workers' compensation claims. - Amends TCA Title 33, Chapter 2; Title 38; Title 39; Title 50; Title 63 and Title 68.