Despite this, people around him generally believed he was smart, so his father, Lionel, enrolled him in Ohio State University. While at OSU, Dahmer’s drinking descended even further — when Lionel went to visit him, Dahmer’s room was full of empty liquor bottles. By this point, Dahmer had committed his first kill (that we know of), and could have been drinking to cope with his inhumane thoughts and desires.

Source: https://www.distractify.com/p/why-was-jeffrey-dahmer-kicked-out-of-the-army