The role of Jeffrey in 'Monster: The Jeffrey Dahmer Story' is portrayed by Evan Peters. His performance has received a lot of attention and praise for its intensity and authenticity.
To my knowledge, there wasn't a Jeffrey Dahmer comic. Generally, such controversial figures aren't the subjects of comics as they often deal with more positive or fictional themes.
Hard to say. You'd need to look into the background and details of 'Been Trail' to determine if it's truly based on real-life events. It could be inspired by reality but still have a lot of creative elements.