Rules of evidence are designed to bring about just and informed decisions. One of these rules, the hearsay rule, is designed to ensure that juries receive reliable evidence, and that out-of-court statements ordinarily are inadmissible. Prosecutors are well aware of these evidentiary restrictions, but occasionally seek to circumvent them. The author describes methods used by some prosecutors to manipulate the hearsay rule and thereby distort the truth-finding process of the trial.
Bennett L. Gershman, Prosecutorial Misconduct in Presenting Evidence: "Backdooring" Hearsay, 31 Crim. L. Bull. 99 (1995), http://digitalcommons.pace.edu/lawfaculty/539