Officers stormed the Martin Place premises in the early hours of December 16, 2014, after Johnson, 34, was shot dead at point-blank range by lone gunman Man Haron Monis following a 17-hour standoff.
“This gentle soul HAD to die before police would enter the Lindt Cafe to rescue anyone,” Johnson’s mother, Rosie Connellan, wrote on Facebook.
“It’s a national disgrace.”
State Coroner Michael Barnes is due to release his findings today following an 18-month inquest into the incident; an inquest the NSW Police Association yesterday dismissed as "a public witch-hunt".
NSWPA's Tony King wrote in The Daily Telegraph that "...instead of scrutiny, police officers were subjected to what can only be described as a media circus.
"Instead of a sober inquisitorial process it descended into an adversarial attack and instead of a search for the truth we witnessed taxpayer funded lawyers on a frolic, cross-examining police officers as if they were on trial."
Connellan dismissed the claims.
"To say this is a witch hunt against the police means they have learnt nothing from this tragedy!" she wrote on Facebook. "The tears keep rolling."