ARGYLE SECURITY, INC.
EXHIBIT 10.2
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<TYPE>EX-10.2
<SEQUENCE>3
<FILENAME>c84822exv10w2.htm
<DESCRIPTION>EXHIBIT 10.2
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<TITLE>Exhibit 10.2</TITLE>
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<DIV align="right" style="font-size: 10pt; margin-top: 10pt"><B>Exhibit
10.2</b>
</DIV>
<DIV align="center" style="font-size: 10pt; margin-top: 10pt"><B>ALLONGE TO GUARANTEED CONVERTIBLE PROMISSORY NOTE (L)</B>
</DIV>



<DIV align="justify" style="font-size: 10pt; margin-top: 10pt"><B>THIS ALLONGE TO GUARANTEED CONVERTIBLE PROMISSORY NOTE (L) </B>(this &#147;Allonge&#148;) is made and entered
into as of the 24<SUP style="font-size: 85%; vertical-align: text-top">th</SUP> day of April, 2009, by and between ISI Detention Contracting Group,
Inc., a California corporation<U> </U>(the &#147;Company&#148;), and Peterson Detention Inc., a California
corporation (the &#147;Holder&#148;).
</DIV>

<DIV align="justify" style="font-size: 10pt; margin-top: 10pt">WHEREAS, the Company executed in favor of the Holder that certain Guaranteed Convertible Promissory
Note (L), dated as of January&nbsp;1, 2008, in the original principal amount of One Million Five Hundred
Thousand and No/100 Dollars ($1,500,000.00), a copy of which is attached as Annex 1 hereto and
incorporated herein by this reference (the &#147;Note&#148;); and
</DIV>

<DIV align="justify" style="font-size: 10pt; margin-top: 10pt">WHEREAS, The Company and the Holder each hereby agree that the Maturity Date as defined in the Note
is in error. In order to correct the definition of the Maturity Date under the Note, the parties
have agreed to execute this Allonge.
</DIV>

<DIV align="justify" style="font-size: 10pt; margin-top: 10pt">NOW, THEREFORE, in consideration of the premises and the mutual covenants herein contained, the
undersigned agree as follows:
</DIV>

<DIV style="margin-top: 10pt">
<TABLE width="100%" border="0" cellpadding="0" cellspacing="0" style="font-size: 10pt">
<TR valign="top" style="font-size: 10pt; color: #000000; background: transparent">
    <TD width="4%" style="background: transparent">&nbsp;</TD>
    <TD width="3%" nowrap align="left">1.</TD>
    <TD width="1%">&nbsp;</TD>
    <TD><DIV style="text-align: justify">The Company and the Holder each agree that the Maturity Date shall be &#147;December&nbsp;31,
2011&#148; and that Schedule&nbsp;A to the Note remains unchanged.</DIV></TD>
</TR>

</TABLE>
</DIV>

<DIV style="margin-top: 10pt">
<TABLE width="100%" border="0" cellpadding="0" cellspacing="0" style="font-size: 10pt">
<TR valign="top" style="font-size: 10pt; color: #000000; background: transparent">
    <TD width="4%" style="background: transparent">&nbsp;</TD>
    <TD width="3%" nowrap align="left">2.</TD>
    <TD width="1%">&nbsp;</TD>
    <TD><DIV style="text-align: justify">Except as amended or revised by this Allonge, the terms of the Note remain in full
force and effect as of the date hereof. In the event the terms of the Note should conflict
with this Allonge, the terms of this Allonge shall control.</DIV></TD>
</TR>

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</DIV>

<DIV style="margin-top: 10pt">
<TABLE width="100%" border="0" cellpadding="0" cellspacing="0" style="font-size: 10pt">
<TR valign="top" style="font-size: 10pt; color: #000000; background: transparent">
    <TD width="4%" style="background: transparent">&nbsp;</TD>
    <TD width="3%" nowrap align="left">3.</TD>
    <TD width="1%">&nbsp;</TD>
    <TD><DIV style="text-align: justify">The Company hereby certifies, represents and warrants to the Holder that all
certifications, representations and warranties made by the Company to the Holder in or in
connection with this Allonge were true in all material respects as of the date of this
Allonge and are true in all material respects on and as of the date hereof as if made on
and as of the date hereof.</DIV></TD>
</TR>

</TABLE>
</DIV>

<DIV style="margin-top: 10pt">
<TABLE width="100%" border="0" cellpadding="0" cellspacing="0" style="font-size: 10pt">
<TR valign="top" style="font-size: 10pt; color: #000000; background: transparent">
    <TD width="4%" style="background: transparent">&nbsp;</TD>
    <TD width="3%" nowrap align="left">4.</TD>
    <TD width="1%">&nbsp;</TD>
    <TD><DIV style="text-align: justify">The obligations evidenced hereby are subordinate in the manner and to the extent set
forth in that certain Subordination Agreement, dated as of October&nbsp;3, 2008 (the
&#147;Subordination Agreement&#148;) among, without limitation, the Holder, ISI Security Group, Inc.,
the Company&#146;s parent (the &#147;Parent&#148;), and the PrivateBank and Trust Company, to the
obligations (including interest) owed by the Parent to the holders of all of the notes
issued pursuant to that certain Loan and Security Agreement, dated as of October&nbsp;3, 2008,
as has been amended (the &#147;Loan and Security Agreement&#148;), as such Agreement may hereafter be
supplemented, modified, restated or amended from time to time; and each holder hereof, by
its acceptance hereof, shall be bound by the provisions of the Subordination Agreement.</DIV></TD>
</TR>

</TABLE>
</DIV>

<DIV style="margin-top: 10pt">
<TABLE width="100%" border="0" cellpadding="0" cellspacing="0" style="font-size: 10pt">
<TR valign="top" style="font-size: 10pt; color: #000000; background: transparent">
    <TD width="4%" style="background: transparent">&nbsp;</TD>
    <TD width="3%" nowrap align="left">5.</TD>
    <TD width="1%">&nbsp;</TD>
    <TD><DIV style="text-align: justify">This Allonge shall be governed by and construed in accordance with the laws of the
State of California.</DIV></TD>
</TR>

<TR style="font-size: 8pt">
    <TD>&nbsp;</TD>
</TR> <TR valign="top" style="font-size: 10pt; color: #000000; background: transparent">
    <TD width="4%" style="background: transparent">&nbsp;</TD>
    <TD width="3%" nowrap align="left">6.</TD>
    <TD width="1%">&nbsp;</TD>
    <TD><DIV style="text-align: justify">A facsimile copy of this Allonge shall be deemed an original for all purposes.</DIV></TD>
</TR>

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<P align="center" style="font-size: 10pt">&nbsp;

<P align="center" style="font-size: 10pt"><!-- Folio -->&nbsp;<!-- /Folio -->
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<DIV align="justify" style="font-size: 10pt; margin-top: 10pt; text-indent: 4%"><B>IN WITNESS WHEREOF</B>, this Allonge to Guaranteed Convertible Promissory Note (L), has been duly
executed by their authorized officers as of the date first written above.
</DIV>

<TABLE width="100%" border="0" cellspacing="0" cellpadding="0" style="font-size: 10pt">
<TR>
    <TD width="48%">&nbsp;</TD>
    <TD width="1%">&nbsp;</TD>
    <TD width="1%">&nbsp;</TD>
    <TD width="35%">&nbsp;</TD>
    <TD width="15%">&nbsp;</TD>
</TR>
<TR>
    <TD valign="top" align="left">&nbsp;</TD>
    <TD colspan="3" align="left" nowrap><B>ISI DETENTION CONTRACTING GROUP, INC.</B>,<BR>
a California corporation<BR>
&nbsp;</TD>
    <TD>&nbsp;</TD>
</TR><TR>
    <TD align="left">&nbsp;</TD>
    <TD valign="top">By:&nbsp;&nbsp;</TD>
    <TD colspan="2" style="border-bottom: 1px solid #000000" align="left">/s/ Donald F. Neville
&nbsp;</TD>
    <TD>&nbsp;</TD>
</TR><TR>
    <TD align="left">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD valign="top">Name:&nbsp;&nbsp;</TD>
    <TD align="left">Donald F. Neville&nbsp;</TD>
    <TD>&nbsp;</TD>
</TR><TR>
    <TD align="left">&nbsp;</TD>
    <TD>&nbsp;</TD>
    <TD valign="top">Title:&nbsp;&nbsp;</TD>
    <TD align="left">CFO&nbsp;</TD>
    <TD>&nbsp;</TD>
</TR>
</TABLE>

<TABLE width="100%" border="0" cellspacing="0" cellpadding="0" style="font-size: 10pt">
<TR>
    <TD width="1%">&nbsp;</TD>
    <TD width="1%">&nbsp;</TD>
    <TD width="35%">&nbsp;</TD>
    <TD width="60%">&nbsp;</TD>
</TR>
<TR>
    <TD colspan="3" align="left">ACCEPTED AND AGREED TO AS OF <BR>
THE DATE FIRST WRITTEN ABOVE:
<BR><BR>
<B>PETERSON DETENTION, INC.</B><BR>
&nbsp;</TD>
    <TD>&nbsp;</TD>
</TR><TR>
    <TD valign="top">By:&nbsp;&nbsp;</TD>
    <TD colspan="2" style="border-bottom: 1px solid #000000" align="left">/s/ Michael Peterson
&nbsp;</TD>
    <TD>&nbsp;</TD>
</TR><TR>
    <TD>&nbsp;</TD>
    <TD valign="top">Name:&nbsp;&nbsp;</TD>
    <TD align="left">Michael Peterson&nbsp;</TD>
    <TD>&nbsp;</TD>
</TR><TR>
    <TD>&nbsp;</TD>
    <TD valign="top">Title:&nbsp;&nbsp;</TD>
    <TD align="left">V.P.&nbsp;</TD>
    <TD>&nbsp;</TD>
</TR>
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<P align="center" style="font-size: 10pt">&nbsp;

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<DIV style="font-family: 'Times New Roman',Times,serif; margin-left: .25in; width: 7.20in">

<DIV align="center" style="font-size: 10pt; margin-top: 10pt">ANNEX 1
</DIV>

<DIV align="center" style="font-size: 10pt; margin-top: 10pt">&#091;Intentionally
omitted&#093;
</div>

<P align="center" style="font-size: 10pt">&nbsp;

<P align="center" style="font-size: 10pt"><!-- Folio -->&nbsp;<!-- /Folio -->
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