Michelle June Russ, 26, of Lancaster, California, was last seen the night of May 9, 2013, at her home in the Quartz Hill area. That day she had felt down but seemed in better spirits by evening and reportedly told a relative she planned to meet people she had encountered earlier. She disappeared after tucking her young son into bed and could not be reached afterward.

Michelle had cerebral palsy, required medication for seizures, and was described as easily influenced, factors the family says made her especially vulnerable. The Los Angeles County Sheriff’s Department has classified her as an endangered missing person and investigators suspect foul play. Family members have urged anyone who knew Michelle or the people she associated with to come forward; some have suggested possible links to other disappearances in the area, but that has not been confirmed.

If anyone knew Michelle, her routines, or who she planned to meet on May 9, 2013, please share what you know with investigators.