Fresno attorney Kenneth Cavin was arrested on suspicion of possession of child pornography by the Clovis Police Department.
Cavin, 57, was booked into jail but is free on $2,500 bail.
His arraignment on a felony child pornography charge is scheduled for Dec. 19 in Fresno County Superior Court.
Cavin could not be reached for comment Thursday, but his attorney, Roger Wilson, said his client denies any criminal activity. Wilson said he could not comment further because he has not seen the alleged evidence against Cavin.
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Cavin, who specializes in family law, has been practicing law since 1993 and has no public record of discipline, the California Bar website shows.
He was arrested Wednesday at Fowler and Tollhouse avenues, not far from his house, Clovis police spokeswoman Janet Stoll-Lee said.
During the investigation, detectives with a search warrant seized evidence from his home that Stoll-Lee described as "terribly disturbing." The evidence included multiple sexual-abuse images with young children, she said.
Most of the photos were downloaded from the Internet. One of the victims has been identified by the National Center for Missing & Exploited Children, Stoll-Lee said.
During the search, detectives also found child sexual-abuse videos, stories of children being molested, lewd child modeling and cartoon images of obscenity, Stoll-Lee said.
The Fresno County District Attorney's Office issued a warrant for Cavin's arrest, Stoll-Lee said. But detectives plan to forward the case to the U.S. Attorney's Office for potential federal charges, she said.
Homeland Security also is involved in the investigation.