The Church of Scientology, stung by a five-part series in the Boston Herald that raised questions about its practices, has hired a private investigator to delve into the Herald reporter's private life.

The Rev. Heber Jentzsch, president of the Church of Scientology International, confirmed that the church's Los Angeles law firm hired the private investigative firm to look into the personal life of reporter Joseph Mallia, who wrote the series.

The Church of Scientology is the only religious organization in the U.S. that uses private investigators to look into the private lives of reporters, several academic experts said.