A 19-YEAR-OLD woman is facing a child endangerment charge after her 4-year-old daughter ate a brownie laced with marijuana, a prosecutor said.

Marisela Guadalupe Barraza first came under suspicion when she brought the child to her sister's South San Francisco home September 26, Chief Deputy District Attorney Steve Wagstaffe said.

The 21-year-old sister noticed the daughter had slow speech, droopy eyelids and was acting strangely.

When confronted by the sister, Barraza replied that her daughter had eaten a pot brownie earlier in the day, Wagstaffe said.