South Carolina permits officers to request blood testing under specified circumstances. One example discussed in the video is a collision in which a medical provider determines that an injury prevents the driver from providing a breath sample.
The video describes a preference for breath testing because it is less invasive, while explaining that blood testing may be authorized in certain situations.
A driver may refuse the requested blood sample, but the refusal can carry license consequences similar to a refusal to provide a breath sample. The testing request and its legal basis should be reviewed in the context of the case.