Tyreke Key had 20 points for the Sycamores (15-16).
Indiana State had 13 team steals contributing to 20 Illinois State turnovers.
The Sycamores forced a season-high 21 turnovers.
Indiana State shot 54 percent from the field and outrebounded Evansville 41-28.
Last Saturday, Indiana State lost at home to Loyola-Chicago in front of a sellout crowd of 10,200.
Tyreke Key led Indiana State (10-8, 2-4) with 19 points and Jordan Barnes added 15.
Tyreke Key scored 14 points and Jordan Barnes added 10 for the Sycamores, which committed 22 turnovers.
Tyreke Key scored 21 points and Cooper Neese added 10 for Indiana State (8-5).
Jordan Barnes had 26 points, eight rebounds, five assists and two steals for Indiana State (5-2).
Indiana State shot 47 percent from the field.