A Brentwood man who threatened multiple New Jersey public officials with harassing emails and social media posts was convicted of cyberstalking in a Los Angeles federal courtroom. Jonathan Lipman, 36, first garnered attention from law enforcement when he posted threatening content on a Facebook page belonging to the Lacey Township Police Department, according to an indictment. That led to a complaint to the LAPD, who paid Lipman a visit and filed a restraining order that barred him from owning firearms, which led him, according to prosecutors, to escalate his attacks against…..