"The majority of homicides involved a single victim. Multiple decedent homicides and homicide-suicide incidents accounted for <3% of violent deaths. The majority of homicides were related to interpersonal conflicts. Crime was a factor in approximately one third of all homicide/legal-intervention deaths, with robbery being the primary circumstance."
"Approximately two thirds of all homicides and approximately one half of all suicides in the United States are committed with a firearm (1). In the 16 states included in this report, firearms were the most common method used in homicides, incidents involving multiple victims, and incidents of homicide followed by suicide. Previous research indicates that interpersonal disputes can escalate and cause serious violent injury or death, especially when weapons of lethal means (e.g., firearms) are involved in the dispute (24,25). Firearms also were the most common method used in suicides; however, methods differed by sex. Firearms were the most common method used by males to complete suicide followed by hanging/strangulation/suffocation. Poisoning was the most common method used by females, followed by firearms."
"Firearms were used in 66.1% of homicides, followed by sharp instruments (12.1%) and blunt instruments (5.8%). No other single method was used in more than 3.4% of homicides (Table 9). Firearms were the most common method used in homicides of males (71.7%) and females (46.4%)."
"A house or apartment was the most common location of homicide for both males and females (44.7% and 72.6%, respectively)."
Source:
http://www.cdc.gov/mmwr/preview/mmwrhtml/ss5904a1.htmCircumstancesOther argument, abuse, conflict: 41.9%
Percipitated by crime: 35.7%
http://www.cdc.gov/mmwr/preview/mmwrhtml/ss5904a1.htm#tab14Just the facts ma'am.