Diseases like HIV, AIDS, Hepatitis~C, Many STD's, etc. are automatically documented in the National CDC [Center-Disease-Control] database System.
Why not, Implement a CGC [Center-Gun-Control] System to Reference> Names-Addresses-etc. of every person who purchased, or will eventually try and purchase Heavy Automatic Weapons, and categorically separate those from the handguns and rifles, purchased for normal personal protection.
Train pre-qualified people in each individual State for this task, along with the FBI's United States, larger collected archive of information [Every State combined] database will help the team know whom to put on WATCH. Along, with whom to STOP or NEVER sell> [such] Weapons.
Collaborating and creating new Centers for the process of gathering information in [each] State, while maintaining one large U.S. database(same idea as criminal database system) to track repeat buyers of multiple high powered weapons.
Automatically import a new mandatory psychological evaluation, to analyze the persons state of mind before giving-having possession of [such] weapon. In light of this required exam, a new law must exist beforehand, explaining psychologists, etc. must not be held culpable if a mistake is made in their judgment of said person/s. [Protected by law]. Having ownership of a high powered weapon such as an AR15 and all heavy duty military style weapons that fire multiple bullets at once, should require much more ownership accountability.
Owners of those particular firearms should be given notice as well as, a reasonable time limit to complete the same required evaluation. Many employers require evaluations before hiring for certain positions. One extra step to put safety measures in place.
It's obvious in many situations that intentions aren't for Self Protection purposes if, said Person/s continue buying multiple automatic high powered Weapons over a [determined] period of time. Some cases, just [one] was needed for mass destruction.
Most, Mass Murderers slipped through the cracks, and all of them were OVERLOOKED in every(non-domestic) "Mass Shooting" after the Columbine school fatalities, and could most likely have been prevented> if SUCH >LIST and >exams had existed(especially now with many death threats against the U.S.).
Enacting new system would not be very difficult, (most information already exists) and could prevent NEW tragedies yet to come. It can be built off, or from an existing list in each individual States database whom already must legally archive the "required" paperwork to purchase weapons.
Separate by GUN >TYPES that were purchased [past>now] and archive the "Automatic Heavy Artillery Weapons" under the created CGC's List and start Cross-matching, using the new trained staff members,[possibly hire experienced unemployed Veterans] employed just for this position-purpose of >STOPPING FUTURE MASS MURDER PLOTS [before they] START<
A Common Sense Approach
So far, Congress- law makers don't have a plan or any ideas directly related to training for this most dire position today. Everything is done today in a fast, [multi-tasking] world and now it's absolutely necessary to have a separate Department or Center included in every State for getting the correct data in time, and STOP it before the next horrific tragedy WILL happen.
Removing guns from families who NEED them for protection, will NOT prevent gun tragedies. Using this proposed type of approach does not impinge on the second amendment rights according to the Constitution, Signed into Law in Year-1789, and Re-visited many times thereafter.
Amendment does allow States to tweak the law to adjust to circumstances and events of the prevailing conditions for today's time. Although, altimately remaining precise in defining the 2nd Amendment with no new change to the original written phrase~Law. Nobody - "Can infringe on [ones] right to bear arms".
Excerpt: It was intentional to repeat a singular part of narrative  times in this article to achieve clarification, that a [plan•idea] [was] ~ Clear ~ Precise and altogether-Understood ' As [a] >>•Common Sense Plan•<< •Tricia'
Resources: Only [One] search site was needed in writing this article. The 2nd Amendment Law, Called~The Constitution of the U.S.A. Written- with many small adjustments in the years, since. Mostly the article is a matter of Plain-Common Sense [to] Re-adjust parts around the Law for the future Safety of America. Most would agree we need a better [plan] in place. Only current ideas on this subject, comes in the form of half hearted political [talks] after a catastrophic event, and put to rest once it's taken down, and no-longer exists as headline News. Apply a necessary plan and quit talking, and Act !