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UNITED STATES
SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

SCHEDULE 13G

Under the Securities Exchange Act of 1934
(Amendment No. )*

Argyle Security, Inc.

(Name of Issuer)

Common Stock

(Title of Class of Securities)

040311102

(CUSIP Number)

December 19, 2008

(Date of Event Which Requires Filing of this Statement)

Check the appropriate box to designate the rule pursuant to which this Schedule is filed:

þ Rule 13d-1(b)

þ Rule 13d-1(c)

o Rule 13d-1(d)

* The remainder of this cover page shall be filled out for a reporting person’s initial filing on this form with respect to the subject class of securities, and for any subsequent amendment containing information which would alter the disclosures provided in a prior cover page.

The information required in the remainder of this cover page shall not be deemed to be “filed” for the purpose of Section 18 of the Securities Exchange Act of 1934 (“Act”) or otherwise subject to the liabilities of that section of the Act but shall be subject to all other provisions of the Act (however, see the Notes).


CUSIP No.		040311102		Page		2		of		10


1	NAMES OF REPORTING PERSONS Luther King Capital Management Corporation


2	CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP (SEE INSTRUCTIONS)
	(a) o
	(b) þ

3	SEC USE ONLY



4	CITIZENSHIP OR PLACE OF ORGANIZATION

	Delaware

		5	SOLE VOTING POWER

NUMBER OF			400,000

SHARES		6	SHARED VOTING POWER
BENEFICIALLY
OWNED BY			0

EACH		7	SOLE DISPOSITIVE POWER
REPORTING
PERSON			400,000

WITH:		8	SHARED DISPOSITIVE POWER

			0

9	AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

	400,000

10	CHECK IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES (SEE INSTRUCTIONS)

	o

11	PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9)

	6.7%

12	TYPE OF REPORTING PERSON (SEE INSTRUCTIONS)

	IA, CO


CUSIP No.		040311102		Page		3		of		10


1	NAMES OF REPORTING PERSONS LKCM Private Discipline Master Fund, SPC


2	CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP (SEE INSTRUCTIONS)
	(a) o
	(b) þ

3	SEC USE ONLY



4	CITIZENSHIP OR PLACE OF ORGANIZATION

	Cayman Islands

		5	SOLE VOTING POWER

NUMBER OF			400,000

SHARES		6	SHARED VOTING POWER
BENEFICIALLY
OWNED BY			0

EACH		7	SOLE DISPOSITIVE POWER
REPORTING
PERSON			400,000

WITH:		8	SHARED DISPOSITIVE POWER

			0

9	AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

	400,000

10	CHECK IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES (SEE INSTRUCTIONS)

	o

11	PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9)

	6.7%

12	TYPE OF REPORTING PERSON (SEE INSTRUCTIONS)

	OO


CUSIP No.		040311102		Page		4		of		10


1	NAMES OF REPORTING PERSONS LKCM Private Discipline Management, L.P.


2	CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP (SEE INSTRUCTIONS)
	(a) o
	(b) þ

3	SEC USE ONLY



4	CITIZENSHIP OR PLACE OF ORGANIZATION

	Delaware

		5	SOLE VOTING POWER

NUMBER OF			400,000

SHARES		6	SHARED VOTING POWER
BENEFICIALLY
OWNED BY			0

EACH		7	SOLE DISPOSITIVE POWER
REPORTING
PERSON			400,000

WITH:		8	SHARED DISPOSITIVE POWER

			0

9	AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

	400,000

10	CHECK IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES (SEE INSTRUCTIONS)

	o

11	PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9)

	6.7%

12	TYPE OF REPORTING PERSON (SEE INSTRUCTIONS)

	PN


CUSIP No.		040311102		Page		5		of		10


1	NAMES OF REPORTING PERSONS p LKCM Alternative Management, LLC


2	CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP (SEE INSTRUCTIONS)
	(a) o
	(b) þ

3	SEC USE ONLY



4	CITIZENSHIP OR PLACE OF ORGANIZATION

	Delaware

		5	SOLE VOTING POWER

NUMBER OF			400,000

SHARES		6	SHARED VOTING POWER
BENEFICIALLY
OWNED BY			0

EACH		7	SOLE DISPOSITIVE POWER
REPORTING
PERSON			400,000

WITH:		8	SHARED DISPOSITIVE POWER

			0

9	AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

	400,000

10	CHECK IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES (SEE INSTRUCTIONS)

	o

11	PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9)

	6.7%

12	TYPE OF REPORTING PERSON (SEE INSTRUCTIONS)

	OO


CUSIP No.		040311102		Page		6		of		10


1	NAMES OF REPORTING PERSONS J. Luther King, Jr.


2	CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP (SEE INSTRUCTIONS)
	(a) o
	(b) þ

3	SEC USE ONLY



4	CITIZENSHIP OR PLACE OF ORGANIZATION

	United States

		5	SOLE VOTING POWER

NUMBER OF			400,000

SHARES		6	SHARED VOTING POWER
BENEFICIALLY
OWNED BY			0

EACH		7	SOLE DISPOSITIVE POWER
REPORTING
PERSON			400,000

WITH:		8	SHARED DISPOSITIVE POWER

			0

9	AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

	400,000

10	CHECK IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES (SEE INSTRUCTIONS)

	o

11	PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9)

	6.7%

12	TYPE OF REPORTING PERSON (SEE INSTRUCTIONS)

	IN


CUSIP No.		040311102		Page		7		of		10


1	NAMES OF REPORTING PERSONS J. Bryan King


2	CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP (SEE INSTRUCTIONS)
	(a) o
	(b) þ

3	SEC USE ONLY



4	CITIZENSHIP OR PLACE OF ORGANIZATION

	United States

		5	SOLE VOTING POWER

NUMBER OF			400,000

SHARES		6	SHARED VOTING POWER
BENEFICIALLY
OWNED BY			0

EACH		7	SOLE DISPOSITIVE POWER
REPORTING
PERSON			400,000

WITH:		8	SHARED DISPOSITIVE POWER

			0

9	AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

	400,000

10	CHECK IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES (SEE INSTRUCTIONS)

	o

11	PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9)

	6.7%

12	TYPE OF REPORTING PERSON (SEE INSTRUCTIONS)

	IN


CUSIP No.		040311102		Page		8		of		10

Item 1(a) Name of Issuer

Argyle Security, Inc.

Item 1(b) Address of Issuer’s Principal Executive Offices

200 Concord Plaza
Suite 700
San Antonio, Texas 78216

Item 2(a) Name of Person Filing

The names of the persons filing this Schedule 13G are LKCM Private Discipline Master Fund, SPC (“Master Fund”), LKCM Private Discipline Management, L.P. (“PDP Management”), LKCM Alternative Management, LLC (“PDP Alternative”), Luther King Capital Management Corporation (“LKCM”), J. Luther King, Jr. and J. Bryan King. Master Fund is the record owner of the shares of Common Stock reported herein. PDP Management owns all of the outstanding management shares of Master Fund. PDP Alternative is the general partner of PDP Management. LKCM is the investment manager for Master Fund. J. Luther King, Jr. is the controlling shareholder of LKCM, and J. Luther King, Jr. and J. Bryan King are controlling members of PDP Alternative.

Item 2(b) Address of Principal Business Offices

The principal business address of Master Fund is P.O. Box 309GT, Ugland House, South Church Street, George Town, Grand Cayman, Cayman Islands, and the principal business address of PDP Management, PDP Alternative, LKCM, J. Luther King, Jr. and J. Bryan King is 301 Commerce Street, Suite 1600, Fort Worth, Texas 76102.

Item 2(c) Citizenship

Master Fund is organized under the laws of the Cayman Islands. PDP Management, PDP Alternative, and LKCM are organized under the laws of Delaware. J. Luther King, Jr. and J. Bryan King are citizens of the United States.

Item 2(d) Title of Class of Securities

Common Stock

Item 2(e) CUSIP Number

040311102

Item 3 Status of Person Filing

(a)	o	Broker or dealer registered under section 15 of the Act (15 U.S.C. 78o).

(b)	o	Bank as defined in section 3(a)(6) of the Act (15 U.S.C. 78c).

(c)	o	Insurance company as defined in section 3(a)(19) of the Act (15 U.S.C. 78c).

(d)	o	Investment company registered under section 8 of the Investment Company Act of 1940 (15 U.S.C. 80a-8).

(e)	þ	An investment adviser in accordance with §240.13d-1(b)(1)(ii)(E).

(f)	o	An employee benefit plan or endowment fund in accordance with §240.13d-1(b)(1)(ii)(F).

(g)	o	A parent holding company or control person in accordance with §240.13d-1(b)(1)(ii)(G).


CUSIP No.		040311102		Page		9		of		10

(h)	o	A savings association as defined in Section 3(b) of the Federal Deposit Insurance Act (12 U.S.C. 1813).

(i)	o	A church plan that is excluded from the definition of an investment company under section 3(c)(14) of the Investment Company Act of 1940 (15 U.S.C. 80a-3).

(j)	o	Group, in accordance with §240.13d-1(b)(1)(ii)(J).

Item 4 Ownership

	(a)		Amount beneficially owned: 400,000

	(b)		Percent of class: 6.7%

	(c)		Number of shares as to which the person has:

	(i)		Sole power to vote or to direct the vote: 400,000

	(ii)		Shared power to vote or to direct the vote: 0

	(iii)		Sole power to dispose or to direct the disposition of: 400,000

	(iv)		Shared power to dispose or to direct the disposition of: 0

Item 5 Ownership of Five Percent or Less of a Class

If this statement is being filed to report the fact that as of the date hereof the reporting person has ceased to be the beneficial owner of more than five percent of the class of securities, check the following: o

Item 6 Ownership of More than Five Percent on Behalf of Another Person

Not applicable.


Item 7		Identification and Classification of the Subsidiary Which Acquired the Security Being Reported on By the Parent Holding Company

Not applicable.

Item 8 Identification and Classification of Members of the Group

Not applicable.

Item 9 Notice of Dissolution of Group

Not applicable.

Item 10 Certification

By signing below I certify that, to the best of my knowledge and belief, the securities referred to above were acquired and are held in the ordinary course of business and were not acquired and are not held for the purpose of or with the effect of changing or influencing the control of the issuer of the securities are were not acquired and are not held in connection with or as a participant in any transaction having that purpose or effect.

SIGNATURE

After reasonable inquiry and to the best of my knowledge and belief, I certify that the information set forth in this statement is true, complete and correct.

Dated: December 23, 2008


		LKCM Private Discipline Master Fund SPC

		By:		Luther King Capital Management Corporation, its investment manager

		By:		/s/ J. Bryan King

				J. Bryan King, Principal and Vice President

		LKCM Private Discipline Management, L.P.

		By:		LKCM Alternative Management, LLC, its general partner

		By:		/s/ J. Bryan King

				J. Bryan King, Managing Member

		LKCM Alternative Management, LLC

		By:		/s/ J. Bryan King

				J. Bryan King, Managing Member

		Luther King Capital Management Corporation

		By:		/s/ J. Bryan King

				J. Bryan King, Principal and Vice President

		/s/ J. Bryan King

		J. Bryan King

		/s/ J. Luther King, Jr.

		J. Luther King, Jr.

EXHIBIT 1

JOINT FILING AGREEMENT

In accordance with Rule 13d-1(k) promulgated under the Securities Exchange Act of 1934, as amended, the persons named below agree to the joint filing on behalf of each of them a Statement on Schedule 13G (including amendments thereto) with regard to the Common Stock of Argyle Security, Inc. and further agree that this Joint Filing Agreement be included as an Exhibit to such joint filings. In evidence thereof, the undersigned, being duly authorized, hereby execute this Agreement as of December 23, 2008.


		LKCM Private Discipline Master Fund SPC

		By:		Luther King Capital Management Corporation, its investment manager

		By:		/s/ J. Bryan King

				J. Bryan King, Principal and Vice President

		LKCM Private Discipline Management, L.P.

		By:		LKCM Alternative Management, LLC, its general partner

		By:		/s/ J. Bryan King

				J. Bryan King, Managing Member

		LKCM Alternative Management, LLC

		By:		/s/ J. Bryan King

				J. Bryan King, Managing Member

		Luther King Capital Management Corporation

		By:		/s/ J. Bryan King

				J. Bryan King, Principal and Vice President

		/s/ J. Bryan King

		J. Bryan King

		/s/ J. Luther King, Jr.

		J. Luther King, Jr.