Joseph DeAngelo is scheduled to appear in a Sacramento courtroom with his lawyer, Diane Howard.
She has filed a motion to block a warrant obtained by the district attorney to take DNA, fingerprints and photos of DeAngelo's body.
Sacramento County District Attorney Anne Marie Schubert obtained the search warrant last week.
News that makes sense
Your trusted source for staying up-to-date with the world around you. Get free daily news updates and analysis, straight to your inbox.
DeAngelo, a 72-year-old former police officer, was arrested last week and identified as the suspect in at least a dozen murders and more than 50 rapes between 1976 and 1986.
Prosecutors say they used DNA and a genealogical website to identify DeAngelo, decades after the case had gone cold.
