Judge
Juvenile Justice
San Francisco County Superior Court
Juvenile Justice Center
Department/Division:
3
375 Woodside Ave
San Francisco , CA 94127
(415) 682-5203
Appointed to the San Francisco County Superior Court by Gov. Gavin Newsom, December 2023; sole practitioner, Costin Law Inc.; adjunct professor, University of San Francisco School of Law, 2011-2017; associate, Dolan Law Firm, 2007-2013
U San Francisco School of Law
Columns
| Title | Category | Published |
|---|---|---|
| Use of a misdemeanor for impeachment | Evidence | Apr. 28, 2025 |
Verdicts & Settlements
| Case Name | Topic | Role | Published |
|---|---|---|---|
| Todd Hearn v. Pacific Gas and Electric Company | Employment Law | Plaintiff | Dec. 2, 2022 |
| Patricia Williams v. Wyndham Vacation Ownership et al. | Employment Law | Plaintiff | Dec. 17, 2016 |
| Gabriel Affonso v. Miguel Rocha d.b.a. M.R. Enterprise | Employment Law | Plaintiff | Aug. 20, 2016 |
| Kenneth Carrethers v. Bay Area Rapid Transit, J. Mehserle, F. Guanzon, K. Smith, D. Horner, R. Haney, and Does 1 through 25, inclusive | Civil Rights | Plaintiff | Dec. 24, 2011 |
MCLE
| Title | Category | Published |
|---|---|---|
| Use of a misdemeanor for impeachment | Evidence | Apr. 28, 2025 |
| Title | Category | Published |
|---|---|---|
| Use of a misdemeanor for impeachment | Evidence | Apr. 28, 2025 |
| Case Name | Topic | Role | Published |
|---|---|---|---|
| Todd Hearn v. Pacific Gas and Electric Company | Employment Law | Plaintiff | Dec. 2, 2022 |
| Patricia Williams v. Wyndham Vacation Ownership et al. | Employment Law | Plaintiff | Dec. 17, 2016 |
| Gabriel Affonso v. Miguel Rocha d.b.a. M.R. Enterprise | Employment Law | Plaintiff | Aug. 20, 2016 |
| Kenneth Carrethers v. Bay Area Rapid Transit, J. Mehserle, F. Guanzon, K. Smith, D. Horner, R. Haney, and Does 1 through 25, inclusive | Civil Rights | Plaintiff | Dec. 24, 2011 |
| Title | Category | Published |
|---|---|---|
| Use of a misdemeanor for impeachment | Evidence | Apr. 28, 2025 |