You know, those things that every single mass shooting of the past fifteen years have in common. [But let's make illegal the thumb hole in my rifle stock, instead.]
They found prescription medication for sertraline, a generic version of Zoloft used to treat depression, panic disorder and obsessive-compulsive disorder; and Clonazepam, usually prescribed to treat anxiety and panic attacks.
The money that pharmaceutical companies has donated to political campaigns was well-invested, wasn't it?