Two other misdemeanor counts, of illegally accessing a computer system and of unauthorized disclosure of information from a DMV record, were dismissed.
Silcocks received credit for a day in the Alameda County Jail, was fined $395, and given three years' probation.
He also was fired from his job and ordered to stay away from Brian Lancaster, one of the alleged victims, and Lesley Regina.
Regina, a San Ramon family law attorney charged with receiving the records sent by Silcocks is set for a hearing on the matter on Oct. 3.
If she is convicted, Regina could face sanctions by the State Bar of California. An attorney can be penalized if he or she commits a criminal act that reflects adversely on his or her honesty, trustworthiness or fitness as a lawyer in other respects, engages in conduct involving dishonesty, fraud, deceit or misrepresentation, or engages in conduct that is prejudicial to the administration of justice, according to the Bar's rules of conduct.
Regina would not comment about the pending criminal case.
The case also sparked a federal civil suit by Lancaster, who is suing Silcocks, Regina, the City of Pleasanton, and Pleasanton Police Officer Tim Martens, although Regina said she'd been dropped from the suit.
Lancaster is suing for $3 million and asking for a jury trial. He claims, among other things, of false arrest and false imprisonment, malicious prosecution, conspiracy to interfere with civil rights, defamation of character and intentional infliction of emotional distress.
The suit stems from what court documents describe as "a bitter custody battle" between Lancaster and his ex-wife, Lisa Secord, who is also named as a defendant, along with her current husband, Louis Secord.
It claims Regina, who was romantically involved with Silcocks, persuaded him to to retrieve information regarding Lancaster confidential databases on three occasions in January and February 2012.
The information was forwarded to Regina, who then sent it along to Lisa Secord for use in family court, the lawsuit says.
The suit also claims that Louis Secord, who had befriended Martens, forwarded the same information to the police officer and asked him to arrest Lancaster.
In January 2012, Martens pulled Lancaster's car car over and arrested him after allegedly finding methamphetamine that, according to the suit, Martens planted in the car.
The charges against Lancaster were later dismissed for lack of evidence.
The lawsuit is set to be heard in federal court early next year. Pleasanton has asked that the suit be dismissed.
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