Detective Quiz. Case #3. The Book Club

From the case materials:

"The body of a 42-year-old farmer has been found in Woodworth's Park in the small town of Steinville, with a gunshot wound to the head. The deceased's arms and legs are spread out to the sides, forming a star-like shape.

According to his wife’s testimony, the man was supposed to return to Steinville from a regular meeting of the popular book club, but around 8:00 PM, he called and warned that he would be a little late. However, he never returned home..."

 Detectives, it’s time to follow the trail of the criminals once again!