The broader heritage/genetic aspect of crime is still in early discovery, too many alinging factors that could point to alternative factors particularly socio-economic and parental. However, the mental health aspects appear to be far more conclusive regarding genetics, and a tie in to criminal behavior there is stronger as well in certain aspects/areas of crime. Drug addiction/crime shows the clearest correlation and abuse aligned with those mental/drug ailments.
That said, mental health is so complex and individual it's very dangerous to cast any wide nets. Some medicines work great for one but not another. Some therapy helps one but not another. Sadly, there's more we don't know than do.
Derka hit on it but the lack of funding for good mental health care and research in the US is terrible.
Conversely as others have noted sometimes all the support in the world won't prevent suicide.
When working my mental health I had a client suffering from depression when a drunk driver ran into the car carrying his wife, son and only child, daughter in law and grand child.
They all passed. He was in his mid 50s. He was getting help and had family support but ultimately took his own life as everyone most important to him in his life was gone in one moment. He was a Longhorn fan and I would talk to him about the prospect of a new season or what was going well outside that but honestly, it was really, really hard to dispute his logic of wanting to join them in the after life. (He was very spiritual)
Then there was another who suffered horrible schizophrenia with voices that told him to kill himself. He got medicated and affected that he had gotten better and no longer heard the voices nor wanted to harm himself. Once released within a day or two he took his own life.
We should do everything we can from cheering on people we know and supporting those in our circle to pushing for funding. We should also never make assumptions about a situation or what someone was suffering. Particularly, we should never assume those around them weren't helping as best they could. That's potentially putting blame on someone already suffering is just additional cruelty.