Court documents revealed that Ericksen tested positive for methamphetamine after the crash.
"A blood sample taken from the defendant shortly after the accident revealed that she had methamphetamine in her system," the police summary of facts stated.
It also said Ericksen had been forbidden to drive on July 1 last year "due to the fact that her learner's licence had expired in 2009".
On August 14 Ericksen's lawyer Peter Kaye indicated the defence was almost ready to proceed to trial. Expert witnesses were expected to give evidence about the crash analysis and the blood-alcohol and blood-drug test results.
Mr Kaye did not respond to the Herald yesterday and Ericksen could not be reached for comment.
When she first appeared in court she was supported by the president of the Auckland chapter of the Hells Angels gang, Douglas Jay, believed to be her current partner. Afterwards her then-lawyer Ron Mansfield said Ericksen had suffered a "tragic loss".
"There's not a moment in the day when she doesn't have that accident in the forefront of her mind. She's striving to deal with the realities of it on a daily basis. She is tremendously affected. She's devastated by the family loss resulting from that accident.
"She will vehemently deny the charges ... in particular the alleged cause of the accident. She denies that any drug was the cause or contributed to the accident," Mr Mansfield said.
Ericksen will be sentenced on November 30. The maximum penalty for killing a person while driving under the influence of drugs is five years in jail or a fine of $20,000.