Source:
Office of the Revisor of the Statutes, Colorado State Legislature
(e)Challenges for Cause.
Challenges for cause may be taken on one or more of the following grounds:
(1)A want of any of the qualifications prescribed by the statute to render a person competent as a juror;
(2)Consanguinity or affinity within the third degree to any party;
(3)Standing in the relation of guardian and ward, master and servant, employer and clerk, or principal and agent to either party, or being a member of the family of any party; or a partner in business with any party or being security on any bond or obligation for any party;
(4)Having served as a juror or been a witness on a previous trial between the same parties for the same cause of action;
(5)Interest on the part of the juror in the event of the action, or in the main question involved in the action, except the interest of the juror as a member, or citizen of a municipal corporation;
(6)Having formed or expressed an unqualified opinion or belief as to the merits of the action;
(7)The existence of a state of mind in the juror evincing enmity against or bias to either party.