An Australian woman accused of murdering relatives with beef Wellington documented herself using kitchen scales to calculate a lethal dose of toxic mushrooms, prosecutors allege. Ms Patterson became the first defence witness to take the stand on Monday afternoon. Ms Patterson said this was not true, but rather an attempt to get "extra vegetables into my kids' bodies". CCTV played at the trial shows Ms Patterson disposing of the appliance at a local dump. "That's why you rushed out, the day after your release from [hospital], to get rid of the evidence," Dr Rogers said.