A psychologist testified about Lindsay Clancy's motivations for killing her children. Kirk Heilbrun examined Clancy and conducted psychiatric tests to understand her actions. He found that Clancy planned to suicide and wanted her children with her so they would not suffer after she was gone.

Clancy claimed to have heard a male voice telling her to kill herself and her children, but this was not reported before or after the incident. The psychologist noted that this would be an unusual pattern if it were a genuine psychotic episode. Further details about the case and the psychologist's testimony are available.