The mother of an 18-month old toddler found dead last week in a mobile home in Alpine was arrested on Monday, according to the San Diego County Sheriff's Department (SDSO).
Lillie Brown, 21, was booked into the Las Colinas Women's Detention and Reentry Facility.
Brown's boyfriend, 26-year old Wiliey Foster had already been arrested in connection with Leah's death on Friday, SDSO said.
Last Tuesday, at around 12:05 p.m., Leah Brown-Meza was found not breathing in a mobile home parked on a property in the 300 block of Hunter Lane in Alpine.
Brown had told deputies she woke up to find the toddler unresponsive and called authorities for help. Despite life-saving efforts, she was pronounced dead.
Investigators said they did find injuries on the body.
Brown is facing three counts of willful cruelty to a child with great bodily injury and/or death.
Foster is expected to be arraigned on Tuesday.
Anyone with information about this incident is asked to call the Homicide Detail at (858)974-2321.