What I found, was that prior to 1999, there was no database at all to track Murder-Suicides in the United States.
According to Murder-Suicide in the United States: 1999 - 2009
The study done by Peter Marzuk, cited in the Shinju report, was done by:
Epidemiologists Marzuk, Tardish
and Hirsch introduced a crude estimate of murder-suicides based on a short (1 week) survey
of murder-suicides in the 1980s (1). The authors used a Time magazine 7-day survey of
firearm murders that found 11 murder-suicide events (one event=one suicide and at least
one murder). That number was extrapolated to a year (1,000 to 1,500 dead annually) and to
the percentage of murders that were part of a murder-suicide (5%). FIGURE 2.1 was
constructed based on 5% of murders at the state level
and Hirsch introduced a crude estimate of murder-suicides based on a short (1 week) survey
of murder-suicides in the 1980s (1). The authors used a Time magazine 7-day survey of
firearm murders that found 11 murder-suicide events (one event=one suicide and at least
one murder). That number was extrapolated to a year (1,000 to 1,500 dead annually) and to
the percentage of murders that were part of a murder-suicide (5%). FIGURE 2.1 was
constructed based on 5% of murders at the state level
Between 1999 and 2007 in the United States (US) there were 6,003 murder-suicide
events, 154,755 murders and 279,540 suicides (see TABLE A.3 for more descriptive statistics
on murder-suicides from 1999 to 2007). The average annual rates per 100,000 were 0.23 for
murder-suicide, 5.86 for murder, and 10.85 for suicide. This paper describes temporal
relationships among the three events while taking into account unemployment and median
household income using US data by month.
events, 154,755 murders and 279,540 suicides (see TABLE A.3 for more descriptive statistics
on murder-suicides from 1999 to 2007). The average annual rates per 100,000 were 0.23 for
murder-suicide, 5.86 for murder, and 10.85 for suicide. This paper describes temporal
relationships among the three events while taking into account unemployment and median
household income using US data by month.
For the entire study:
Seven thousand four hundred forty-six (7,446) murder-suicide events
were captured for the United States (US) between January 1, 1999 and December 31, 2009.
A total of 15,748 individuals died and 1,314 were injured in those events.
were captured for the United States (US) between January 1, 1999 and December 31, 2009.
A total of 15,748 individuals died and 1,314 were injured in those events.
Murder-suicides only make up
approximately 4% of murders and 2% of suicides annually. Interestingly however, the results
from the current study were altered considerably once murder-suicides were aggregated into
murder and suicide counts (results not shown).
approximately 4% of murders and 2% of suicides annually. Interestingly however, the results
from the current study were altered considerably once murder-suicides were aggregated into
murder and suicide counts (results not shown).
Interestingly however, the results
from the current study were altered considerably once murder-suicides were aggregated into
murder and suicide counts (results not shown). Only one cluster with all three events was
found when murder-suicide was aggregated into murder and suicide. Additionally, there were
clusters of murder/suicide in Washington state, murder and suicide clusters in Indiana and
Illinois, and 2 suicide clusters in California when previously there were no clusters in those
areas.
from the current study were altered considerably once murder-suicides were aggregated into
murder and suicide counts (results not shown). Only one cluster with all three events was
found when murder-suicide was aggregated into murder and suicide. Additionally, there were
clusters of murder/suicide in Washington state, murder and suicide clusters in Indiana and
Illinois, and 2 suicide clusters in California when previously there were no clusters in those
areas.
The number of victims is a little more than double the number of events. That doesn't leave much room for multiple victim events.
If we're comparing based on the number of events of murder-suicide vs the total number of suicides, I'm wrong. According to the information in these studies, they're pretty much equal.
If the numbers are, in fact, skewed because of the lack of classification, I may be right or I may still be wrong. As I said, more attention is needed and it's difficult to give while I'm working.
For those that want to do more reading, there is also:
American Roulette: Murder-Suicide in the United States

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