(Tigard, OR) -- More charges have been filed against a Tigard-area woman who's accused of mistreating children in her care. Sixty-seven-year-old Ana Miranda and 74-year-old Charles "Randy" Ward were arrested earlier this year after detectives learned a child was chained up in their house for over 12 hours a day. The child was also strangled, hit, kicked, and verbally abused for taking drinks and food from the kitchen. The investigation found two additional children who were also abused. Miranda faces five counts of criminal mistreatment and four counts of tampering with a witness. Miranda and Ward remain in custody at the Washington County Jail.