I know who the mysterious blackmailer is

You know that mysterious blackmailer that made Miss Teri Tale a candidate for the election? It's Sheriff Allen! The outline matches with the cowboy hat and glasses and he would know about all of the residents. He was a huge fan of Miss Teri Tale and get her into the Jason's kidnapping so that she has a plot to use. What do you think?

this could be true. but how do I do the third key sequence, i am stuck. thank you