In 1993, Kellermann studied homicides in Cleveland, Memphis, and Seattle, over five years, finding that such homicides occurred nearly three times more often in homes where guns were kept than in otherwise comparable control homes where there was no gun.
In 1993, Kellermann was the lead investigator in a case-control study that looked at all homicides occurring in the victims' homes in Cleveland, Memphis, and Seattle, over five years. The results showed that such homicides occurred nearly three times more often in homes where guns were kept than in otherwise comparable control homes where there was no gun.