Manna also has been charged with shooting at another church member, Linda Grossnickle, 44, who narrowly escaped injury.
He also is a suspect in the shooting of a Washington Township, Pa., man, authorities there said.
Beverlin said the church has not considered bringing in counselors from the national Church of the Brethren.
A community meeting is planned for Monday at 7:30 p.m. at the church parish hall for residents to ask questions of Frederick County State's Attorney Scott Rolle, according to Beverlin.
She said she has heard such forums might help people vent their anger so that they can begin the healing process.
Delauter, 53, was a Sunday school teacher, a deacon, Christian Education chair and Kids Klub coordinator at the church, located in the western part of Frederick County near the Washington County line.
She was married with three children and seven grandchildren. She was preceded in death by a daughter.
Services will be held for her Friday at 10 a.m. at Grossnickle Church of the Brethren. Burial will be in the adjoining cemetery. The family will receive friends today from 7 to 9 p.m. at Ricketts Funeral Home, Myersville, Md.
Delauter was slain late Monday after she answered a knock on her front door in the 12000 block of Wolfsville Road, .
That same night, shots were fired at Grossnickle through the door of her Wolfsville Road home, but she escaped injury.
Delauter and Grossnickle were close friends of Manna's estranged wife, Barbara, and had given her their support when she filed for divorce late last year.
Barbara Manna's whereabouts haven't been disclosed by friends or authorities.
Washington Township Police Chief Kurt Braun said he was still working on charges Wednesday afternoon in connection with the shooting of Richard Sanchez, 48, at his home north of Waynesboro, Pa.
Ralph Manna is a suspect in the Sanchez shooting, Braun said.
Sanchez was listed in serious condition Wednesday night in the intensive care unit at Washington County Hospital.
Sanchez and his wife, Candace, knew Manna because of a shared interest in flying airplanes, Candace Sanchez has said.
Manna has been charged in Frederick County with first-degree murder, attempted murder, first-degree assault, and two counts of use of a handgun in commission of a felony.
He was being held without bond at the Frederick County Detention Center on Wednesday.
Manna was scheduled to appear before a Frederick County judge today for a bond review hearing.