Matthew L’Heureux

Board Member

Matthew L’Heureux is an Assistant District Attorney with the Monterey County District Attorney’s Office. He received a Bachelor of Arts in Literature/Writing from the University of California, San Diego. He attended law school at University of California College of the Law, San Francisco (formerly UC Hastings College of the Law) where he earned his Juris Doctor with a concentration in criminal law.

Mr. L’Heureux has worked for the County of Monterey since August of 2012. While he has held a variety of meaningful assignments over his years with the office, his proudest achievement to date has been assisting with the creation and implementation of the Monterey County District Attorney’s Office Cold Case Task Force in 2020, which represents the most comprehensive effort of county law-enforcement agencies to collaboratively re-open and investigate cold-case homicides.

Mr. L’Heureux was a member of the prosecution teams that successfully convicted Alfred Powell for the 1982 murder of Sandra Steppuhn of Seaside; Charles Allen Holifield for the 1998 kidnapping and murder of 13-year-old Christina Marie Williams of Seaside; Anthony Martezz Randall for the 1995 murder of Lloyd Perkins, Jr. of Seaside; Michael Scott Glazebrook for the 1981 sexual assault and murder of Sonia Herok-Stone of Carmel; Jimmy Torres Rodriguez for the 1999 murder of Elias Gutierrez Diaz of Salinas: and Robert John Lanoue for the 1982 abduction, sexual assault and murder of 5-year-old Anne Pham of Seaside. 

In 2022, Mr. L’Heureux received the “Prosecutor of the Year” award from the California District Attorney Investigators’ Association. He has taught a variety of courses to attorneys, law students and police agencies on topics including legal writing and research, trial advocacy, opening statements and closing arguments, appellate advocacy, report writing/courtroom testimony, the stages of criminal prosecution, conditional examinations, and how to prevent elder abuse.