Loretta Wade is a Doctor and also the Jefferson Parish Coroner who regularly assists the NCIS New Orleans Office led by NCIS Special Agent Dwayne Cassius Pride with various cases that the NCIS team investigate.
She is also the adoptive mother of Danny Malloy and CJ Malloy.
Biography
Pre-Series
Born in Santa Fe, New Mexico, Wade spent some time in Austin, Texas before she went up to Cambridge, Mass, to attend Harvard University.
At some point, she married a man named Reginald with the marriage turning abusive but Loretta managed to find the strength to leave him and presumably divorce him.
However, she was working on a case at the time and was left emotionally affected with the outcome seeing Jack Gordon, the main suspect being sent to prison for twenty years.
She later flew down to New Orleans for a visit in 1997 but has never left, even saying she still has the return ticket.
In 1998, Loretta was working at the Jefferson Parish Coroner's Office, serving as an assistant to Jared Wallace, the Medical Examiner in charge at time. She met Dwayne Cassius Pride, a Sheriff in Jefferson Parish with the two becoming close friends.
After Wallace presumably retired, Loretta became the official Medical Examiner and has continued to hold the post to this day.
NCIS Season 11

Wade in the NCIS Season 11/NCIS: New Orleans backdoor pilot episode, "Crescent City Part 1".
Loretta made her debut appearance in the NCIS Season 11/NCIS: New Orleans backdoor pilot episode, "Crescent City Part 1".