Brown also said investigators are reviewing video surveillance tapes from a nearby convenience store for clues in the brutal killing. A preliminary autopsy found she died of "multiple sharp force injuries," and a veteran local prosecutor described the crime scene as "the most horrific" he's ever witnessed.
Law enforcement officials have been tightlipped about details of the crime or a possible motive, but held a meeting with pastors in Anadarko warning them to take security precautions at their buildings. Authorities said they have not ruled out the possibility that the killer specifically targeted a pastor or a church.
Brown said that on the video, Daniels' car can be seen pulling up to the church about 10 a.m. Sunday. She declined to say whether any suspect was seen.
"The most they've gleaned from the tape so far is to give them a timeline of when she arrived," Brown said.
A visitor who arrived at the church shortly before noon saw Daniels' car but found the door to the church locked, District Attorney Bret Burns said Thursday. The person walked to the nearby Anadarko police station and notified officers, who discovered Daniels' body. Burns did not identify the visitor.
Burns, who met with local pastors Wednesday, did not say why the meeting was held just with them rather than the community at large, or what kind of a threat the clergy might face.
No arrests have been made and investigators have no suspects, Brown said. The agency is offering a $10,000 reward for information leading to an arrest and conviction.
"We're still running down leads, conducting interviews and doing all the things we do in a normal investigation," Brown said.
Daniels, who lived in Oklahoma City, made the 60-mile drive to Anadarko every week, even though the small, weather-beaten church had no regular congregation.