What biological materials can be classified as DNA evidence?

The classification of biological materials as DNA evidence primarily revolves around substances that contain human cells, which can be analyzed to obtain DNA profiles. Human hair and bones fit this category because they can both yield DNA. Human hair, particularly when it has intact follicles, contains cells that can provide DNA for analysis, while bones, as part of the skeletal remains, also contain DNA due to the presence of living matter within them, particularly the marrow.

Other choices, while they might have relevance in an investigative context, do not provide viable DNA samples. For example, clothing and textiles may have human DNA if they are contaminated with bodily fluids or skin cells, but they are not inherently considered biological materials containing DNA. Likewise, drugs and weapons are not biological materials and do not yield DNA evidence. Money and valuables, similarly, do not have biological material by themselves that could be used for DNA testing. Thus, human hair and bones are the only choices listed that inherently represent biological materials capable of providing DNA evidence.