Exhibit 23.1 KILLMAN, MURRELL & COMPANY, P.C. 1931 E. 37th Street, Suite 7 Odessa, Texas 75202-3797 June 22, 1998 United States Securities and Exchange Commission 450 Fifth Street, N.W. Washington, D.C. 20549 Re: Consent to Disclosure regarding Dismissal Ladies and Gentlemen: We have read the disclosure under Item 4 in the Company's Report on Form 8-K dated June 22, 1998 relating to the dismissal of our firm and agree with such statement. Very truly yours, Killman, Murrell & Company, P.C. By: /s/ Michael Killman ---------------------- Name: Michael Killman Title: President