N.H. Rev. Stat. § 570-A:7
The attorney general, deputy attorney general, or a county attorney, upon the written approval of the attorney general or deputy attorney general, may apply to a judge of competent jurisdiction for an order authorizing or approving the interception of telecommunications or oral communications, and such judge may grant, in conformity with RSA 570-A:9, an order authorizing or approving the interception of telecommunications or oral communications by investigative or law enforcement officers having responsibility for the investigation of the offenses as to which the application is made, when such interception may provide, or has provided, evidence of the commission of organized crime, as defined in RSA 570-A:1, XI, or evidence of the commission of the offenses of homicide, kidnapping, gambling, theft as defined in RSA 637, corrupt practices as defined in RSA 640, child sexual abuse images under RSA 649-A, computer pornography and child exploitation under RSA 649-B, criminal conduct in violation of the securities law, as defined in RSA 421-B:5-501, RSA 421-B:5-502, RSA 421-B:5-502-A, RSA 421-B:5-505, RSA 421-B:5-506, and RSA 421-B:5-508, criminal conduct in violation of the security takeover disclosure laws, as defined in RSA 421-A:3, 421-A:7, 421-A:8, 421-A:11, and 421-A:13, robbery as defined in RSA 636:1, arson as defined in RSA 634:1, hindering apprehension or prosecution as defined in RSA 642:3, tampering with witnesses and informants as defined in RSA 641:5, aggravated felonious sexual assault as defined in RSA 632-A:2, felonious sexual assault as defined in RSA 632-A:3, escape as defined in RSA 642:6, bail jumping as defined in RSA 642:8, insurance fraud as defined in RSA 638:20, dealing in narcotic drugs, marijuana, or other dangerous drugs, hazardous waste violations under RSA 147-A:4, I, or any conspiracy to commit any of the foregoing offenses.
RSA 570-A:7
1969, 403:1. 1985, 263:3. 1988, 25:4. 1990, 191:1. 1995, 280:10, III. 1998, 361:4, eff. Jan. 1, 1999. 2001, 224 : 10 , eff. Sept. 9, 2001. 2015, 273 : 19 , eff. Jan. 1, 2016. 2017, 91 : 6 , eff. Aug. 6, 2017.