It would lead to an ID not just if the mother is arrested (and has to provide a DNA sample), but also if the mother has other offspring (male or female), brothers or sisters, or aunts or uncles on her mother's side of the family.
In fact, anyone connected to the mother in her family tree by a continuous chain of female relatives would trigger a CODIS hit (e.g., If the mother's-mother's-mother had a sister, who had a daughter, and that daughter had a child (male or female) who was arrested and had to provide a DNA sample, it would trigger a CODIS hit!!) :crazy:
Are you confused yet?

You will be tested on this next Wednesday!!!