N.H. Rev. Stat. Ann. § 169-B:9-a

An officer may release a minor to an alternative to secure detention, with court approval, pending the arrival of the parent, guardian, or custodian. The alternative program may release the minor to the parent, guardian, or custodian upon their arrival. Any court or police or juvenile probation and parole officer, acting in good faith pursuant to this section, shall have immunity from any liability, civil or criminal, which might otherwise be incurred or imposed as a result of release to an alternative to secure detention.