Well you can declare/believe what you want, doesn't change the facts.
Law Center to Prevent Gun Violence – Gun Law Information Experts
You will notice that the risk of death by homicide increases to 90% by having a gun in the home, and those in possession of one increases 4.5 times more likelihood to be shot by one.
The students of Dr. Mark Ferris's Mathematical Statistics 460" class ask,
"In how many of the homicides was the victim killed with a gun that was kept in the house rather than a gun that was brought to the house by the perpetrator?"
The question is a relevant one since, as the letter also notes, the study's authors had stated in part based on their findings that "
people should be strongly discouraged from keeping guns in their homes [p. 1090]."
In other words, the students are well aware that advising people against keeping a gun in the home doesn't make sense unless it causes an increase in homicide risk.
Kellermann's first response to the students was incorrect: "Ninety-three percent of the homicides involving firearms
occurred in homes where a gun was kept, according to the proxy respondents." In a follow-up letter (four years later) Kellermann acknowledges his error, but still fails to directly answer the question.
Kellermann's own data suggests that for all gun homicides of matched cases
no more than 34% were murdered by a gun from the victim's home. (GunCite's analysis of Kellermann's data.) (The data, such as it is, is available at
http://www.icpsr.umich.edu/cgi/archive.prl?study=6898).
34% is probably on the charitable side since it assumes all family member or intimate homicides were commited by offenders living with the victim which is highly unlikely given that not all intimates (as defined in the Kellermann dataset: spouse, parents, in-laws, siblings, other relatives, and lovers) were likely to have lived with an adult victim.
A subsequent study, again by Kellermann, of fatal and non-fatal gunshot woundings, showed that only 14.2% of the shootings involving a gun whose origins were known, involved a gun kept in the home where the shooting occurred. (Kellermann, et. al. 1998. "Injuries and deaths due to firearms in the home." Journal of Trauma 45:263-267) ("The authors reported that among those 438 assaultive gunshot woundings, 49 involved a gun 'kept in the home where the shooting occurred,' 295 involved a gun brought to the scene from elsewhere, and another 94 involved a gun whose origins were not noted by the police [p. 252].") (Kleck, Gary. "Can Owning a Gun Really Triple the Owner's Chances of Being Murdered?" Homicide Studies 5 [2001].)