In December, Harris gave the boy his first cell phone as a Christmas gift and the two began exchanging text messages, according to the report. The boys' parents said he also kept the phone with him until one day last week.
While her son was at a neighbor's home Jan. 11, the boy's mother told police she read explicit text messages Harris had sent, the report states. Harris had sent numerous messages dating back several days and many were sexually explicit in nature, according to investigators.
Harris was arrested on Jan. 14 and is being held without bond.
Brookwood Baptist Church pastor Dean Oliver said Harris was a volunteer and had passed a background check "as is our policy for all adults that work with our kids."
Oliver said the church is cooperating fully with police and providing counselors for the victim, the victim’s family and other members of the church.
The investigation into Harris' relationship with the boy also involves police investigators in Macon, Smith said.
Harris was in charge of middle school boys on a late December church retreat in the middle Georgia city, police said. Harris and the boy allegedly shared a bed in a hotel room during that trip.