Stop and identify:
http://en.wikipedia.org/wiki/Stop_and_identify_statutes
Excerpts:
“Stop and identify” statutes are laws in the United States that allow police[1] to detain persons and request such persons to identify themselves, and arrest them if they do not.
In the United States, interactions between police and citizens fall into three general categories: consensual (“contact” or “conversation”), detention (often called a Terry stop, after Terry v. Ohio, 392 U.S. 1 (1968)), or arrest. “Stop and identify” laws pertain to detentions.
States with “stop and identify” laws
AlabamaAla. Code §15-5-30
ArizonaAri. Rev. Stat. Tit. 13, §2412 (enacted 2005)
ArkansasArk. Code Ann. §5-71-213(a)(1) (loitering)
ColoradoColo. Rev. Stat. §16-3-103(1)
DelawareDel. Code Ann., Tit. 11, §§1902, 1321(6)
FloridaFla. Stat. §901.151 (Stop and Frisk Law); §856.021(2) (loitering and prowling)
GeorgiaGa. Code Ann. §16-11-36(b) (loitering)
IllinoisIll. Comp. Stat., ch. 725, §5/107-14
IndianaIndiana Code §34-28-5-3.5
KansasKan. Stat. Ann. §22-2402(1)
LouisianaLa. Code Crim. Proc. Ann., Art. 215.1(A); La. Rev. Stat. 14:108(B)(1)(c)
MissouriMo. Rev. Stat. §84.710(2)
MontanaMont. Code Ann. §46-5-401
NebraskaNeb. Rev. Stat. §29-829
NevadaNev. Rev. Stat. §171.123
New HampshireN.H. Rev. Stat. Ann. §594:2, §644:6
New MexicoN.M. Stat. Ann. §30-22-3
New YorkN.Y. Crim. Proc. Law §140.50
North DakotaN.D. Cent. Code §29-29-21 (PDF)
OhioOhio Rev. Code §2921.29 (enacted 2006)
Rhode IslandR.I. Gen. Laws §12-7-1
TexasTexas Penal Code §38.02(a)(b)
UtahUtah Code Ann. §77-7-15
VermontVt. Stat. Ann., Tit. 24, §1983
WisconsinWis. Stat. §968.24