I didn&#x27;t do quite as much research for this one, but here&#x27;s CDC&#x27;s &quot;leading causes of death&quot; table for 2013.[1]<p>#1 for 25-34: unintentional injury with 16,209 deaths.<p>#2 for 25-34: suicide, 6,348 deaths (but if you don&#x27;t engage in risky behavior, you wouldn&#x27;t commit suicide, right?)<p>#3 for 25-34, homicide, 4,236 deaths - the vast majority of these are _not_ in mass-shooting incidents, of course.<p>#4 is cancer (3,673 deaths) and #5 is heart disease (3,258 deaths).<p>By the way, for felony homicides, the majority (69.1%) are perpetrated against a single victim[2].<p>[1] (PDF warning): <a href="http:&#x2F;&#x2F;www.cdc.gov&#x2F;injury&#x2F;wisqars&#x2F;pdf&#x2F;leading_causes_of_death_by_age_group_2013-a.pdf" rel="nofollow">http:&#x2F;&#x2F;www.cdc.gov&#x2F;injury&#x2F;wisqars&#x2F;pdf&#x2F;leading_causes_of_deat...</a><p>[2]: <a href="https:&#x2F;&#x2F;www.fbi.gov&#x2F;about-us&#x2F;cjis&#x2F;ucr&#x2F;crime-in-the-u.s&#x2F;2011&#x2F;crime-in-the-u.s.-2011&#x2F;tables&#x2F;expanded-homicide-data-table-4" rel="nofollow">https:&#x2F;&#x2F;www.fbi.gov&#x2F;about-us&#x2F;cjis&#x2F;ucr&#x2F;crime-in-the-u.s&#x2F;2011&#x2F;...</a>