Scientific Evidence

Before scientific evidence can be properly admitted, the party offering the evidence must lay a proper foundation. It must be shown that: (1) the general scientific principles and techniques involved are valid and capable of producing reliable results, and (2) the person performing the test substantially performed the scientific procedures in an acceptable manner.  Harper v. State, 249 Ga. 519 (1982); Jefferson v. State, 312 Ga. App. 842 (2011).