P.R. Laws Ap. tit. 34A, § 1–A, Rule 6.6
Upon founded petition of the Prosecutor and through resolution to that effect, for investigative purposes, the court may authorize the use of mechanisms for the identification of a minor such as fingerprinting, photography and the utilization of a lineup.
Fingerprinting shall be limited to cases where fingerprints have been found in the place of the events and is deemed necessary for the verification of existence of prior personal contact between the minor and objects in such a place.
The fingerprint records, photographs and negatives thereof shall be sent to the court immediately after the investigation is concluded. They shall be identified only with the name, address and birth date of the minor, and shall be filed in the record inside a sealed envelope which shall be opened only upon court order. These shall remain there until the minor turns twenty-one (21) years old.