Here's what you need to know this morning.

Reward for leads in security guard murder

The widow of a security guard killed during an armed robbery of a cash van will join NSW Police today in announcing a $1 million reward for information about his death.

Gary Allibon complied with the orders of four bikies to hand over the money he was carrying to replenish a Sydney ATM when he was shot dead on June 7, 2010.

The 59-year-old's body was left on the steps of an office block on Sussex Street just before sunrise.

Monica Allibon woke to a love letter from her husband left on the kitchen bench but when she turned on the television, she learnt a man matching her husband's description was shot dead in the city.

Aged-care worker denied symptoms

The operator of a Sydney aged-care facility where residents and staff have tested positive for coronavirus says the staff member who was the source of the infection denied being sick or having any symptoms.

Anglicare CEO Grant Millard said the worker said she had no contact with any confirmed cases and Mr Millard said it was now up to authorities to investigate her actions.

"If this was an attempted assault or a physical assault, you'd always go to police," he said.

"I'm not aware it's in that category but we just want to be operating completely transparently, supporting our staff when they do the right thing but if they haven't, they absolutely need to be investigated."

If you want more coronavirus news, try these:

Healthcare worker 'spat on'

A woman has been charged after she allegedly spat in the face of a doctor in Sydney earlier this week.

The 35-year-old was admitted to a hospital in Hornsby where she was seeking treatment for a large laceration to her arm.

A doctor began treating her wound when she allegedly spat in his face and became aggressive.

The woman was arrested and taken to Hornsby Police Station where she was charged with common assault.

George Pell defender appointed

Bret Walker will have "extraordinary powers" to investigate all agencies involved in the matter. ( AAP: Julian Smith )

Noted Sydney silk Bret Walker will conduct a special commission of inquiry into the Ruby Princess debacle, which resulted in 18 deaths and hundreds of confirmed cases of coronavirus.

NSW Premier Gladys Berejiklian appointed Mr Walker, the barrister who successfully appealed George Pell's conviction in the High Court.

Mr Walker will be given "extraordinary powers" to investigate all matters and agencies involved with the Ruby Princess's departure and its return on March 19.

Psychedelic treatment for mental health

Professor Maree Teesson said she had doubts about medicinal psychedelics ( Supplied )

A more drastic approach involving the introduction of psychedelic drugs for therapy is needed to tackle the long-term psychological impact looming over Australia, a mental health charity has argued.

Former Liberal MP Andrew Robb, now a board member of Mind Medicine Australia (MMA), is driving a new campaign to introduce drugs such as MDMA and psilocybin — found in magic mushrooms — as treatment options.

But Maree Teesson, the director of The Matilda Centre for Research in Mental Health and Substance Use, said the standard of clinical results for psilocybin were not up to scratch yet.

