The Latest on security changes following the fatal shooting of a social worker (all times local):

7:05 p.m.

Police say the daughter of a woman charged with shooting and killing a social worker and three of her own relatives a year ago is missing after being released from prison.

Authorities say Desiree Herring had been incarcerated earlier this year for multiple convictions. They say she was released Thursday and placed at a residence in Barre, Vermont, under terms of her prison furlough. But police were still searching for her Wednesday.

Herring is the daughter of Jody Herring, who is charged with shooting Lara Sobel outside a state office building in Barre on Aug. 7, 2015, after shooting her own three relatives. Jody Herring has pleaded not guilty.

The Burlington Free Press (http://bfpne.ws/2aUUevn ) reports that Vermont officials warned state workers Wednesday morning and boosted security in Barre as a precaution.

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12:05 a.m.

A year after a social worker was killed outside a state office building, the state employees' union says Vermont hasn't done enough to protect workers.

Police say Lara Sobel was shot on Aug. 7, 2015 by a woman upset over losing custody of her daughter. Jody Herring has pleaded not guilty to killing Sobel and three of her own relatives.

The Human Services secretary says the Legislature allocated a finite amount of funding for building improvements so a careful planning process was undertaken.

He says this fiscal year the state will begin adding safety glass reception windows, lock down buttons, security cameras and onsite security in some buildings.

The union's president says "taking a full year to address a serious safety crisis is not acceptable" and has called for the state to make other security changes immediately.