; (F) often have standard operating procedures for investigations that establish policies and evidence-based best practices for conducting and completing homicide investigations; and (G) have better relationships with the communities they serve, even if no specific community-oriented campaign or initiative exists between investigative units and community groups. (5) Criminal justice agencies should collaborate with each other and share best practices for solving homicides and firearm-related violent crimes. (6) A comprehensive community engagement strategy concerning gun violence is essential to improving clearance rates for homicides and firearm-related violent crimes. 3. Grant program with respect to violent incident clearance and technological investigative methods (a) Definitions In this section: (1) Clearance by arrest The term clearance by arrest , with respect to an offense reported to a law enforcement agency, means the law enforcement agency— (A) has— (i) arrested not less than 1 person for the offense; (ii) charged the person described in clause (i) with the commission of the offense; and (iii) referred the person described in clause (i) for prosecution for the offense; or (B) has cited an individual under the age of 18 to appear in juvenile court or before another juvenile authority with respect to the offense, regardless of whether a physical arrest occurred. (2) Clearance by exception The term clearance by exception , with respect to an offense reported to a law enforcement agency, means the law enforcement agency— (A) has identified not less than 1 person suspected of the offense; and (B) with respect to the suspect described in subparagraph (A), has— (i) gathered enough evidence to— (I) support an arrest of the suspect; (II) make a charge against the suspect; and (III) refer the suspect for prosecution; (ii) identified the location of the suspect so that the suspect could be taken into custody immediately