In indirect speech present perfect tense is back shifted to past perfect tense. For example - John said, "I have written a letter." (Direct speech) John said that he had written a letter. (Indirect speech)
But why I see in news articles that the present perfect tense is often not back shifted to past perfect tense ?
For example - The President said that investigators have conducted hearings on different issues. (Direct speech - President said "The investigators have conducted hearings on different issues"
Why often I see in news articles that present perfect tense is not back shifted to past perfect tense though in almost every book its written present perfect tense is to be converted to past perfect tense in reported speech ? Please advise me on it. Thank You