Most of the empirical literature on juvenile homicide has emerged from the clinical experience of mental health professionals who have diagnosed and/or treated youngsters who killed. After a critical review of this literature, data on 787 juvenile homicide offenders are presented and discussed. These data indicate that intrafamilial killings represent but a small fraction of all homicides perpetrated by juveniles and that there are clear differences between intrafamilial and extrafamilial juvenile homicides.

Logit and logistic regression analyses were employed to explore the nature, extent and predictors of behaviors indicative of "being bullied" and of "bullying others" in a sample of 125 adult male offender-patients sectioned for enduring mental illness and detained within a high-secure psychiatric hospital. The study addresses the lack of research into this specialized population to date, with a subsidiary aim of comparing the results directly with a previous study conducted with a population of adult male personality-disordered offender-patients (n = 53). Participants were required to complete a self-report behavioral checklist (Direct and Indirect Patient behavior Checklist-Hospital version Revised). The prediction that indirect (subtle) aggression would be reported more frequently than direct aggression was supported in relation to perpetration estimates, with evidence such aggression was also more prevalent among personality-disordered than mentally ill offender-patients. As predicted verbal aggression was the most commonly reported direct behavior. Although it was predicted that those perpetrating aggression would present with increased experience with secure settings this was only supported with regard to bully-victims. Contrary to the prediction made, those victimized did not present with less experience of secure settings. Consistent with the hypothesis, bully/victims were predicted by increased negative behavior toward staff and hospital rules. The results are discussed in relation to the environment in which the aggression is taking place with the implications for practice and future research outlined.

Valles Caldera 1 (VC‐1) is the first Continental Scientific Drilling Program (CSDP) core hole drilled in the Valles caldera and the first continuously cored well in the caldera region. The objectives of VC‐1 were to penetrate a hydrothermal outflow plume near its source, to obtain structural and stratigraphie information near the intersection of the ring fracture zone and the precaldera Jemez fault zone, arid to core the youngest volcanic unit inside the caldera (Banco Bonito obsidian). Coring of the 856‐m well took only 35 days to finish, during which all objectives were attained and core recovery exceeded 95%. VC‐1 penetrates 298 m of moat volcanics and caldera fill ignimbrites, 35 m of precaldera volcaniclastic breccia, and 523 m of Paleozoic carbonates, sandstones, and shales. A previously unknown obsidian flow was encountered at 160 m depth underlying the Battleship Rock Tuff in the caldera moat zone. Hydrothermal alteration is concentrated in sheared, brecciated, and fractured zones from the volcaniclastic breccia to total depth with both the intensity and rank of alterations increasing with depth. Alteration assemblages consist primarily of clays, calcite, pyrite, quartz, and chlorite, but chalcopyrite and sphalerite have been identified as high as 450 m and molybdenite has been identified in a fractured zone at 847 m. Carbon 13 and oxygen 18 analyses of core show that the most intense zones of hydrothermal alteration occur in the Madera Limestone above 550 m and in the Madera and Sandia formations below 700 m. This corresponds with zones of most intense calcite and quartz veining. Thermal aquifers were penetrated at the 480‐, 540‐, and 845‐m intervals. Although these intervals are associated with alteration, brecciation, and veining, they are also intervals where clastic layers occur in the Paleozoic sedimentary rocks.

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