Check this footnote at the bottom of the amicus' page 20, 32 of 48 on my pdf page counter.
7. In addition to the 44 States that expressly protect a right to bear arms in their constitutions, three other States protect a right to self-defense and defense of property. CAL. CONST. art. I, § 1 (originally adopted in 1849); IOWA CONST. art. I, § 1 (originally adopted in 1846); N.J. CONST. art. I, ¶ 1 (originally adopted in 1844). As the Court has noted, “the inherent right of self-defense has been central to the Second Amendment right.” Heller, 128 S. Ct. at 2817. Only Maryland, Minnesota, and New York have neither guarantee in their state constitutions.
I feel naked. Otherwise, it's a pretty good read. Thank you Texas and the other states supporting this amicus brief. Folks like me behind enemy lines appreciate it.
Thanks for the ping!