The family of Kristen Spears alleges an overdose of the drug manufactured by Irvine-based Allergan Inc. killed her at age 7.
Spears started getting Botox injections at the age of 6 — not to smooth furrows in her brow, but to calm spasms in her legs.
The girl was born with severe cerebral palsy, and Botox, best known as a face-lift-in-a-syringe, can relax contorted muscles and sometimes help young patients walk without surgery.