While history has shown that the most notorious mass shooters in this century were taking antidepressants or Selective Serotonin Reuptake Inhibitors (SSRIs) before they carried out the deadly rampages, there are a number of killings that have been linked directly to the dangerous drugs. In fact, the pharmaceutical companies behind the most popular SSRI's have paid hundreds of millions of dollars in damages:

Eli Lilly Paid Secret Settlements to Survivors After Man on Prozac Went on Shooting Rampage in 1989

Joseph T. Wesbecker, 47, carried out a mass shooting in which he shot 20 workers at Standard Gravure Corp. in Kentucky, in September 1989. Eight of the victims were fatally wounded, and Wesbecker ended the rampage by shooting and killing himself.