POWER OF ATTORNEY

    Know all by these presents, that the undersigned hereby constitutes and appoints each of
    Kathleen W. Benjamin, signing singly, the undersigned?s true and lawful attorney-in-fact to:

(1)	execute for and on behalf of the undersigned, in the undersigned?s capacity as an officer and/or
director of SeraCare Life Sciences, Inc. (the ?Company?), a Form ID ? Uniform Application for
Access Codes to File on Edgar and Forms 3,4 and 5 in accordance with Section 16(a) of the
Securities Exchange Act of 1934 and the rules promulgated thereunder;

(2)	do and perform any and all acts for and of behalf of the undersigned which may be necessary or
desirable to complete and execute any such Form ID, Form 3,4, or 5 and timely file such form
with the United States Securities and Exchange Commission and any stock exchange or similar
authority; and

(3)	take any other action of any type whatsoever in connection with the foregoing which, in the
opinion of such attorney-in-fact, may be of benefit to, in the best interest of, or legally required by,
the undersigned, it being understood that the documents executed by such attorney-in-fact on
behalf of the undersigned pursuant to this Power of Attorney shall be in such form and shall
contain such terms and conditions as such attorney-in-fact may approve in such attorney-in-fact?s
discretion.

    The undersigned hereby grants to each such attorney-in-fact full power and authority to do and
perform any and every act and things whatsoever requisite, necessary, or proper to be done in the exercise
of any of the rights and powers herein granted, as fully to all intents and purposes as the undersigned might
or could do in personally present, with full power of substitution or revocation, hereby ratifying and
confirming all that such attorney-in-fact, or such attorney-in-fact?s substitute or substitutes, shall lawfully
do or cause to be done by virtue of this power of attorney and the rights and powers herein granted.  The
undersigned acknowledges that the foregoing attorneys-in-fact, in serving in such capacity oat the request
of the undersigned, are not assuming, nor is the Company assuming,, any of the undersigned?s
responsibilities to comply with Section 16 of the Securities Exchange Act of 1934.

    This Power of Attorney shall remain in full force and effect until the undersigned is no longer required
to file Forms 3,4,and 5 with respect to the undersigned?s holdings of and transaction in securities issued
buy the Company, unless earlier revoked by the undersigned in a signed writing delivered to the foregoing
attorneys-in-fact.

    IN WINESS WHEREOF, the undersigned has caused this Power of Attorney to be executed as of this
13th day of December 2004.





							/s/ Kathleen W Benjamin, Attorney-in-fact

Thomas F Lawlor