akon guode was interviewed as part of the ongoing investigation into the deaths of three children .
the children 's sudanese mother , 35 , was behind the wheel of a grey 2005 toyota kluger when it crashed into the lake at wyndham vale in melbourne 's outer west just before 4 pm on .
one-year-old bol and four-year-old twins madit and anger all died after the 4wd they were in plunged into the water .
police have retrieved the four-wheel-drive after it was plunged into the wyndham vale on wednesday .