are not uncommonly factors in suicides.
http://www.bankruptcylawnetwork.com/bankruptcy-foreclosure-and-suicide/
Last week, a young father of two and a political candidate for office in Bristol, Connecticut committed suicide. He left behind a note which showed that he was concerned about his finances and wanted to avoid bankruptcy. The 38 year old had just started a new business and was facing difficulties in the current economy. In Berkeley, California, a 51 year old man killed his family and then himself in a murder-suicide. His note also indicated financial problems. The issue of financial problems leading to suicide range from college students buried in credit card debt and student loans to the elderly saddled with medical bills and decreased insurance coverage.
As noted there, people who commit suicide do not always kill only themselves. And the presence of firearms is particularly associated with suicide-homicide, since firearms provide the easiest and most effective way to kill other(s) and then one's self.
http://en.wikipedia.org/wiki/Murder%E2%80%93suicide
In a research specifically related to murder–suicide, Milton Rosenbaum (1990) discovered the murder–suicide perpetrators to be vastly different from perpetrators of homicide alone. Whereas murderer–suicides were found to be highly depressed and overwhelmingly men, other murderers were not generally depressed and more likely to include women in their ranks.[2] In the U.S. the overwhelming number of cases are male-on-female and involve guns.[3] Around one-third of partner homicides end in the suicide of the perpetrator. From national and international data and interviews with family members of murder–suicide perpetrators, the following are the key predictors of murder–suicide: access to a gun, a history of substance abuse, the male partner some years older than the female partner, a break-up or pending break-up, a history of battering, and suicidal ideation by the perpetrator.
Though there is no national tracking system for murder–suicides in the United States, medical studies into the phenomenon estimate between 1,000 to 1,500 deaths per year in the US,[4] with the majority occurring between spouses or intimate partners, males were the vast majority of the perpetrators, and over 90% of murder suicides involved a firearm. Depression, marital or/and financial problems, and other problems are generally motivators.
So unfortunately, other people may well be at risk in situations like the one you describe.
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