Exhibit 99

Joint Filer Name: Address: Designated Filer: Date of Event Requiring Statement: Issuer Name and Ticker or Trading Symbol:			Quadrangle Capital Partners LP 375 Park Avenue, 14 Floor, New York, New York 10152 POI Acquisition, L.L.C 06/04/10 Protection One, Inc. (PONE)

Signature:	QUADRANGLE CAPITAL PARTNERS LP

	By:	Quadrangle GP Investors LP, its General Partner
	By:	Quadrangle GP Investors LLC, its General Partner
	By:	/s/ Peter Ezersky
	Name:	Peter Ezersky
	Title:	Managing Member
Name: Address: Designated Filer: Date of Event Requiring Statement: Issuer Name and Ticker or Trading Symbol:			Quadrangle Capital Partners-A LP 375 Park Avenue, 14 Floor, New York, New York 10152 POI Acquisition, L.L.C 06/04/10 Protection One, Inc. (PONE)

Signature:	QUADRANGLE CAPITAL PARTNERS-A LP

	By:	Quadrangle GP Investors LP, its General Partner
	By:	Quadrangle GP Investors LLC, its General Partner
	By:	/s/ Peter Ezersky
	Name:	Peter Ezersky
	Title:	Managing Member

Name: Address: Designated Filer: Date of Event Requiring Statement: Issuer Name and Ticker or Trading Symbol:			Quadrangle Select Partners LP 375 Park Avenue, 14 Floor, New York, New York 10152 POI Acquisition, L.L.C 06/04/10 Protection One, Inc. (PONE)

Signature:	QUADRANGLE SELECT PARTNERS LP

	By:	Quadrangle GP Investors LP, its General Partner
	By:	Quadrangle GP Investors LLC, its General Partner
	By:	/s/ Peter Ezersky
	Name:	Peter Ezersky
	Title:	Managing Member
Name: Address: Designated Filer: Date of Event Requiring Statement: Issuer Name and Ticker or Trading Symbol:			Quadrangle GP Investors LP 375 Park Avenue, 14 Floor, New York, New York 10152 POI Acquisition, L.L.C 06/04/10 Protection One, Inc. (PONE)

Signature:	QUADRANGLE GP INVESTORS LP

	By:	Quadrangle GP Investors LLC, its General Partner
	By:	/s/ Peter Ezersky
	Name:	Peter Ezersky
	Title:	Managing Member

Name: Address: Designated Filer: Date of Event Requiring Statement: Issuer Name and Ticker or Trading Symbol:			Quadrangle GP Investors LP 375 Park Avenue, 14 Floor, New York, New York 10152 POI Acquisition, L.L.C 06/04/10 Protection One, Inc. (PONE)

Signature:	QUADRANGLE GP INVESTORS LLC

	By:	/s/ Peter Ezersky
	Name:	Peter Ezersky
	Title:	Managing Member

QUADRANGLE SELECT PARTNERS LP 4