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Diary in lieu of thesis (M.P.A. - Public Administration) -- University of Arizona.

This dissertation study focused upon four stages in the forensic evaluation process, including its impact upon judicial decisions. A group of defendants referred for a pretrial forensic evaluation between October, 1974 and October, 1976 was compared with defendants not referred for evaluation. The results indicated that (1) the defendants referred for forensic evaluation were very similar to those defendants not referred for pretrial examination except that the diverted population was more frequently in custody, remained in custody for a longer time, and remained in the criminal justice system awaiting disposition for a longer time. (2) Factors associated with a recommendation of incompetency and/or insanity included the diagnosis, a poor prognosis, a previous competency evaluation, and past history of hospitalization. (3) Generally forensic competency recommendations were followed by the courts; however, judges were more willing to overrule experts' recommendations of incompetence than competence. When experts agreed the defendent was sane at the pretrial the court followed the recommendation; 1 defendant out of 95 was found insane. When the experts' agreed the defendant was insane at the pretrial evaluation, the defendant was found insane at time of adjudication only 13.5%, though in over 40% of the cases the charges against the defendant were dismissed; still, in nearly half the cases the defendant was found guilty of the crime. (4) The defendants referred and considered competent by the experts were later found guilty and sentenced to prison time more often than defendants who either were not evaluated or considered incompetent by the experts. These diverted but competent defendants received credit less often for time served while in custody than the nonevaluated defendants. Defendants who were considered incompetent by the experts were later less often found guilty, and seldomly sentenced to prison. For these defendants there was a greater likelihood that the criminal charges would be dismissed. However, these defendants were subsequently committed to a mental hospital, and therefore did not "beat their raps." Finally, the greatest likelihood for a not guilty by reason of insanity verdict occurred when previously the experts disagreed as to the competence of the defendant to stand trial.

Numerical values for parameters which characterize melting regimes and differentiation history have been determined for a suite of genetically-related calc-alkaline rocks. Isotopic ratios of Nd and Sr vary sympathetically, with the least differentiated and oldest rocks having ε(Nd) = -4.3 and ⁸⁷/Sr⁸⁶Srₒ = 0.7069 and the most differentiated and youngest characterized by ε(Nd) = -8.5 and ⁸⁷Sr/⁸⁷/Srₒ = 0.7092. These observations imply that a process which might relate the various units is that of invasion of the crust by mantle-derived magmas and progressive assimilation. The most negative Nd values may well represent the isotopic signature of the crustal rocks which melted. Melting of a 1.8 Ga source region (an age characteristic of the basement in southeastern Arizona) which had a ¹⁴⁷Sm/¹⁴⁴Nd ratio of .13 would yield Laramide melts with and ε(Nd) of -8.5. This Sm/Nd ratio is characteristic of a somewhat mafic (lower?) crust, a character consistent with petrological and chemical evidence which suggest that the source was intermediate to mafic in composition and of amphibolite grade. Solution of the isotopic data yields a value of r (that instantaneous ratio of assimilated material to crystallizing magma) equal to 0.6 to 0.9. These values are reasonable considering heat budgets of crystallization and fusion in the lower crust. Solution of the set of equations for changes in concentration of the trace elements yields numeric values for the f, fraction of remaining melt for each unit in the series. The values are: andesite, f-0.63; granodiorite, f-0.42 to 0.32; and the final granite stocks and dikes, f-0.34. The modeling provides insight into the way an igneous suite intimately associated with copper mineralization has evolved. The porphyry ore bodies are related to long-lived and large magma systems. At the level of mineralization and observation, we sample only a small portion of the system. The importance of subduction to metallogenesis may be that it provides a heat source, in the form of mantle-derived magma, which allows extensive melting of hydrous crust. Thus, as is becoming evident from other studies as well, assimilation and crustal anatexis are major processes in generating granitoid rocks at convergent plate boundaries.

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