The killing of parents and stepparents by biological and stepchildren is a rare event. Incidents involving multiple parricide victims and/or multiple parricide offenders are an even rarer occurrence. The majority of studies on parricide involve a single victim and single offender. Using the National Incident-Based Reporting System (NIBRS), this study identified 603 single-victim, single-offender incidents, 22 single-victim, multiple-offender incidents, 60 single-offender double parricide incidents, 17 multiple-offender double parricide incidents, and 15 familicide incidents over the 20 year period 1990 to 2010. Univariate and bivariate analyses examined parricidal incidents involving single or multiple offenders and single or multiple victims with the aim of investigating juvenile and adult involvement in double parricide and familicide. Frequencies reported include victim, offender, and incident characteristics for all types of parricide incidents. Consistent with prior research on single-victim, single-offender parricide, the results indicated that the typical parricide offender was a white male approximately 30 years of age. A firearm predominated as the weapon of choice for all parricide incidents; however, when a biological mother was one of the victims, the offender(s) used more diverse methods. When multiple offenders were involved in double parricides, however, the offenders tended to be younger and were more likely to include a female accomplice. Only one case of familicide involved a female offender, and none of the familicide incidents involved multiple offenders. Study limitations and implications for prevention are also discussed.

Theft of construction equipment, materials, and tools from construction sites results in approximately one billion dollars in direct annual losses to the U.S. construction industry per year. A better understanding of theft characteristics is vital to reducing this figure. This study analyzes over 15,000 incidents from the National Incident-Based Reporting System (NIBRS) to understand characteristics such as theft prevalence, average monetary losses, and recovery rates. The study finds that contractors lost an average of about $6,000 per incident. Trucks are the most expensive theft targets, with an average loss of about $42,000 per incident, and also the most likely item to be recovered (55% of the time). However, recovery rate across all targets was less than 7%. The results of this study provide the most accurate and extensive statistics to date on construction theft characteristics. The study also identifies best practices to reduce thefts such as the use of survellience systems. Further, the use of advanced marking and tracking systems to safeguard expensive equipment and vehicles and aid their recoveries are discussed. The findings are expected to aid contractors and law enforcement agencies in formulating methods for reducing thefts of construction items and improving the likelihood of their recoveries.

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