The loss of Weymouth, MA Sgt. Michael Chesna impacts all of law enforcement and the behavior of the shooter must not be repeated. Sgt. Chesna will be buried on Friday July 20, 2018 with the full honors for the hero he was.
“And maybe just remind the few, if ill of us they speak, that we are all that stands between the monsters and the weak.” Michael Marks
MSefton's Human Behavior Blog 
What can we learn from this? The accused perp was known to be a dealer, was considered dangerous enough to have a restraining order against him by his mother, had prior arrests, was known to be mentally ill, and had access to a gun. Years ago, there was a mass closure of in-patient mental institutions which were said to be both ineffective and expensive, but this guy shouldn’t have been on the street. But where do you put him?
We’re going to have more of these until we have better control over firearms and are willing to admit that some people can’t be out in public.
Vic Crain I agree with you that the shooter in this case was giving off “red flags” that he may be an imminent danger to law enforcement and/or members of the Weymouth, MA community. There are too many of these individuals walking among us. Some are readily identifiable but many are not. The man under arrest for Sgt. Chesna’s murder demonstrated his violent tendencies over 4 years ago in public high school. The shooter first struck Sgt. Chesna with a large rock and took his firearm shooting him 10 times in the upper body. In an open society he had not crossed the line and would have been quickly discharged from any hospital bed in the state. There are fewer and fewer hospital beds available as noted in the July 18, 2018 Boston Globe for patients with mental health disorders. This is something I find reprehensible. Massachusetts once had the finest system of mental health care and assessment in the country. Thank you for your informed comment.