Another person with mental health issues that the toxic online “Twitter mafia” drove to suicide.

Are you sure Twitter is to blame? It seems like he was abused by the police.

I worked with him at the time of his death shortly after Christmas of 2015. There was definitely a toxic twitter mob, and it's also true that he had been in police custody the day before, but whether either of these things was the reason for his suicide was never clear.

I think the parent was wondering before they passed.

The use of "was" in the parent as opposed to "is" tells you that they are already aware.