https://people.com/3-dead-kansas-city-chiefs-fans-cause-of-death-toxicology-report-85578213 Dead Kansas City Chiefs Fans' Early Toxicology Report Shows Traces of Substances: ReportAccording to FOX 4 Kansas City, the Kansas City Police Department has received the toxicology report for the three men who were found dead in the backyard of their friend Jordan Willis' home on Jan. 9. The outlet reported that the toxicology report shows that there were "several" substances in their body.TMZ also reported that the toxicology results showed that there were substances in the men's bodies, citing sources.
So no traces of semen in their stomach then.