Complex sentence: A dragging death is a death caused by someone being dragged behind or underneath a moving vehicle, whether accidental or as a deliberate act of murder, when it is also known as a dragging murder.
Split into simpler sentences: A dragging death is a death caused by someone being dragged behind or underneath a moving vehicle, whether accidental or as a deliberate act of murder. If it is homicide, then it is also known as a dragging murder.