Assistant Police Chief Lee Jackson said officers were questioning a "person of interest" Friday as the search continued for a missing mother whose 3-year-old son was found tied up in a wooded area near a Clarksdale, Miss., church.

Jackson said no charges had been filed, and officials were not releasing the name of the person in custody.

Family members called Clarksdale police Wednesday to report that Katrina Dumas, 27, and her son, Fred Dumas, were missing.

Coahoma County Sheriff Andrew Thompson Jr. said the toddler was found Thursday night near Pleasant Grove Baptist Church. Thompson said the boy had marks from being tied up and had suffered numerous insect bites while on the ground.

Officials said Fred was taken to Le Bonheur Children's Medical Center in Memphis, Tenn., although the hospital said the boy was not registered there Friday.

Katrina Dumas' parents, Johnny and Catherine Dumas, were notified by a granddaughter that Katrina had not picked up Fred from school at the scheduled time Wednesday, authorities said.

Later that day, relatives spotted Katrina Dumas' gold Cadillac being driven in Clarksdale by someone other than her. The family alerted authorities after seeing the car. The Clarksdale Press Register reported Friday that police found the abandoned vehicle and discovered what appeared to be blood and possible hair in the trunk.

The vehicle was being processed by the state Crime Lab.

Several law enforcement agencies, including the Coahoma County Sheriff's Department and the Clarksdale Police Department, were searching for Katrina Dumas.