EXHIBIT 5


                                WHITE & CASE LLP
                                633 FIFTH STREET
                             LOS ANGELES, CA 90071
                           TELEPHONE: (213) 620-7700
                           FACSIMILE: (213) 687-0758

                                  June 12, 2000

Capco Energy, Inc.
2922 E. Chapman, Ste.202
Orange, CA 92869

RE:     Capco Energy, Inc. Registration Statement on Form S-8

Ladies & Gentlemen:

     We have acted as counsel to Capco Energy, Inc., a Colorado corporation (the
"Company"),  and are familiar with the proceedings and documents relating to the
proposed registration by the Company,  through a Registration  Statement on Form
S-8  (the  "Registration  Statement"),  to be  filed  by the  Company  with  the
Securities and Exchange  Commission,  of (i) options to acquire 1,000,000 shares
of Common Stock of the Company (the  "Options") and (ii) 35,000 shares of Common
Stock of the Company  (collectively,  the "Shares").  The Options and the Shares
are to be issued to  Walton C.  Vance,  John R.  Aitken  and  Thomas D.  Herstad
pursuant to Business  Consulting  Contracts (as amended through the date hereof)
between the Company and Marquette Ventures LLC.

     For the purposes of rendering this opinion,  we have examined  originals or
photostatic copies of certified copies of such corporate records, agreements and
other  documents of the Company as we have deemed  relevant  and  necessary as a
basis for the opinion hereinafter set forth. In our examination, we have assumed
the genuineness of all signatures,  the authenticity,  accuracy and completeness
of the  documents  submitted to us as  originals,  and the  conformity  with the
original  documents of all documents  submitted to us as copies. Our examination
was limited to the following documents and no others:

     1.   Certificate of Incorporation of the Company, as amended to date;

     2.   By-Laws of the Company, as amended to date;

     3.   Resolutions   adopted  by  the  Board  of  Directors  of  the  Company
          authorizing the Agreements and the issuance of the Shares; and

     4.   The Business Consulting Contracts described above.





     We have not  undertaken,  nor do we intend to  undertake,  any  independent
investigation  beyond such  documents and records,  or to verify the adequacy or
accuracy of such documents and records.

     Based on the foregoing,  we are of the opinion that the Shares, when issued
and  paid  for,  will  be  duly  authorized,  validly  issued,  fully  paid  and
nonassessable.

     We are members of the Bar of the State of California. We are not members of
the Bar of the State of Colorado. The opinion set forth herein is based upon our
review of Section  7-106-202 of Title 7 of the Colorado  Revised Statutes as now
in effect.  We express no opinion as to any other laws of the State of  Colorado
or the laws of any other jurisdiction.

     The  information  set  forth  herein is as of the date of this  letter.  We
disclaim any  undertaking  to advise you of changes  which may be brought to our
attention after the effective date of the Registration Statement.

     We  consent to the use of this  opinion  as an exhibit to the  Registration
Statement.


                                                   Very truly yours,


                                                   /s/ White & Case LLP