The 26-year-old New Zealand tourist fell to her death from Tostee's 14th floor balcony in August 2014.
After Tostee was found not guilty, police referred the case back to the Coroner, Terry Ryan, who confirmed this week that his investigation had been reopened.
Evans commented on Tostee's status hours later, asking her former partner why he would even post about it.
"If you know this and are adamant there will be no new information found ... then why make a status about it and allow as you do people to bicker and speculate and name call further ... You got the best possible result ... You are not the only victim in all of this ... Loosing (sic) all respect and love now and I know you better than anyone. This is just sad Gable," she wrote.
It comes just weeks after the two split, with Evans claiming she could not continue with the relationship.
But along with the "haters" Tostee also had a string of supporters who encouraged Tostee to "stay strong" and "make the most of his life".
Legal sources have confirmed a charge such as deprivation of liberty could still potentially be recommended by the Coroner in the Tostee case.