SANTA ANA — A 32-year-old man convicted in November of multiple weapons violations after he was previously accused of threatening a mass shooting at UC Irvine was sentenced Tuesday to time served behind bars before his trial and was expected to be released from jail.

Sebastian Bogdan Dumbrava was convicted Nov. 13 of five counts of manufacture, sale, or receipt of a large-capacity magazine that is prohibited, all felonies.

Jurors deadlocked on felony counts of delivery of a threatening letter with intent to extort and attempt to extort property or other consideration by means of threat.

The jury deadlocked 9-3 and 8-4 for guilt. Deputy District Attorney William Ha asked Orange County Superior Court Judge Terri Flynn-Peister Tuesday to dismiss the deadlocked charges for extortion. Dumbrava was sentenced to three years in prison, or time already served behind bars.

Dumbrava was convicted in March 2021 of unlawful possession of a firearm and being a prohibited person owning ammunition, both felonies.

“April 2019 marked what was to become a long-standing feud between (Dumbrava) and the University of California Irvine and the University of California Irvine Police Department,” Ha said in a trial brief.

“After anonymous emails and social media Reddit posts about starting fires at the school and starting a mass shooting at the school were attributed to Mr. Dumbrava,” he was placed on a psychiatric hold and interim suspension as a student, Ha said.

Dumbrava created a Twitter account and “began posting his displeasure with the suspension by UCI” and his hospitalization, Ha said.

“In several of the posts, (Dumbrava) alluded to a lawsuit against the UCI Regents and also began `tagging’ UCI directors and staff with several of his posts,” Ha said.

Dumbrava sued the UC regents in August 2019 and then emailed the attorney representing the school system with references to a study regarding active shooter profiles, the prosecutor said. Dumbrava cited a report saying active shooters exhibit 3.6 stressors before an attack and that he had at least six of them.

The defendant also tweeted about an article regarding the Virginia Tech mass shooting “and how much the lawsuit cost taxpayers,” Ha said.

The defendant was again placed on a psychiatric hold and suspended from the school, Ha said. While searching his residence, police found 1,200 rounds of ammunition, “many high-capacity magazines , and tool kits and parts to build an AR rifle.”

After he was convicted and released from jail in October 2021, he once again “took to Twitter once more and openly admitted to preparing to commit a mass shooting on the UCI campus,” Ha said.

“He elaborated that he planned to shoot the UCI students in the event UCI failed to provide him restitution,” the prosecutor said. “He went so far as to implying that it would feel good to openly kill UCI students. The concerning tweets continued where he admitted to possessing 600 rounds in 20 30- round capacity magazines in order to kill many UCI students in a short span of time. He further expressed his belief that `society deserves mass shootings.”‘

Dumbrava was arrested Jan. 10, 2020, and convicted March 16, 2020, of unlawful possession of a firearm and a prohibited person owning ammunition, both felonies. He was sentenced March 24, 2021, to three years and eight months in state prison, according to court records.

Dumbrava was arrested Jan. 11, 2022, for violating terms of his probation and investigators found receipts from gun stores in Arizona that were stored in his mother’s storage locker in Anaheim, police said.

UCI issued this statement assuring the community it will safeguard against any violence:

“The safety and well-being of the UC Irvine community is our highest priority, and the university always takes a proactive approach to campus security and safety. We are committed to maintaining a secure campus environment and using every available measure to prevent and respond to potential threats. We will continue to monitor the situation to determine the appropriate response to any safety-related issues. We remain dedicated to fostering a safe and supportive campus for all.”