Erik Groves, a lobbyist who represents chiropractors, stands accused of improper campaigning in the process to replace outgoing Republican minority leader Mike May (pictured) at the state capitol. Groves will testify later this week, according to the Rocky Mountain News.

The scandal led May to rescind his resignation from office in December as Republican Representatives David Balmer, of Centennial, and Frank McNulty, of Highlands Ranch, vied to replace him in the leadership role.

May has filed a complaint alleging that Balmer worked to influence Representative Cindy Acree, an Aurora Republican, who was “on the fence” regarding the selection process. Acree has also complained, stating that two chiropractors wanted to discuss her vote with her, a possible violation of rules.

The Legislature’s ethics committee, chaired by Senator John Morse, a Colorado Springs Democrat, has requested communications records, such as email and phone records, from Groves, according to the Denver Business Journal.

Balmer, meanwhile, vigorously denies allegations of unethical behavior, according to The Denver Post.