A woman has been charged with common assault after police alleged she tried to attack the DPP worker outside the Supreme Court.

It is the second time in three months a court user has been charged with attacking a prosecutor. A mentally ill Canberra man was jailed last month over an assault inside a Supreme Court courtroom in November.

Now, police are hunting for 48-year-old Leanne Lacey after the Watson woman failed to front court last Friday to answer the common assault charge.

Police will allege Lacey was staging a one-woman protest outside the court on Thursday, February 25, about the treatment of her son, Dennis Lacey, by the Aboriginal Legal Service when she began to scream abuse and threaten passers-by, eventually assaulting the prosecutor as she made her way to court.

After the incident, all 36 of the office's prosecutors agreed to repeat their demands to make their workplace safe and pointed out the airport-style security at Canberra's courts was protecting judges and magistrates but leaving other court users at greater risk.

The DPP staff first issued a plea to their director for action after an attack during which a colleague was hit twice from behind with a lectern in what Chief Justice Terence Higgins described an ''aggressive, unprovoked attack''.

The director, Jon White, has been negotiating with the leaders of the Magistrates and the Supreme Court in an effort to win concessions for his staff.

For more on this story, see the print edition of today's Canberra Times.