Stories about a screaming root belong to mandrake folklore. Check the plant name before attaching that story to datura or treating a legend as botanical evidence.
Identify which legend is being told
The story of a root that screams when lifted is associated with mandrake folklore. Datura is a different plant group. Similar translated names should not be used to transfer the story from one plant to the other as a botanical fact.
Folklore is a narrative source
Read the dramatic details as elements of a story, not as evidence about what happens when a root is dug. A retelling should identify its tradition where a reliable source is available and avoid inventing historical proof.
Keep observation separate from use
A plant's role in folklore does not establish safe handling, food use or medicinal value. Use an authoritative species reference for identification and do not collect or experiment with an unknown plant to reenact the legend.
Related reading: Poppies in Flower Symbolism and Storytelling.