This is the first time reoccurring character Forensic Tech Ryan O'Halloran (Mike Doyle ) appears on SVU. However this isn't Doyle's first role, he first starred in Prodigy (2002) as Asst. ME Karlan.
This is the first appearance Callie Thorne makes as Defense Attorney Nikki Staines. Subsequent to this episode, Ms. Thorne has made six additional appearances in this role on SVU (as of May 2019): S05E23: Bound (2004); S18E03: Imposter (2016); S19E16: Dare (2018); S20E04: Revenge (2018); S20E18: Blackout (2019); S20E24: End Game (2019).
Scientists believe that about 2 to 5 percent of the U.S. population may have an Fetal Alcohol Spectrum Disorder (FASD).