People v. Cook
Illinois Appellate Court
Criminal Court
Frye Hearing
Defendant was convicted of involuntary manslaughter in death of his four-month-old son, who died as result of subdural hematoma. Court did not commit reversible error in refusing to instruct jury on definition of recklessness. Neither contested issue in case—whether Defendant performed acts resulting in infant’s death and whether he did them recklessly—were closely balanced. Nature and amount of evidence supporting verdict were clear, convincing and overwhelming. Court was not required to hold Frye hearing on admissibility of evidence of shaken baby syndrome (SBS). Infant was not “diagnosed” with SBS by either of the State’s experts; and SBS is not a methodology but a conclusion that may be reached based on observations and medical training which is not new or novel. (FITGZERALD SMITH and LAVIN, concurring.)