I believe what you say is true, although this particular shooting probably isn’t representative of those social pressures.
Ironically, that may not be the case. As in the Great Depression, large scale economics does not seem to be a major driving force to such violence. Those who do get violent due to having money problems do so even when the economy is booming, so the statistics stay about the same.
In a downturn, though many people are economically hard off, there doesn’t seem to be much direct translation to their family life.
And while most people assume a financial windfall might be as destructive, unless it does so immediately, it too will not usually matter too much.