By now, LASD knows at least the basic ballistics of the TB shooting. This would include ammunition type and distance from which it was fired. They also should have a reasonable grasp on identifying the type of firearm that was used.
From what we know of the Meliss Tantangelo car shooting, a shotgun was used at close range. The ammo was a slug. A single shot was fired.
James Rogers says he was shot at close range. Anyone know the size of the pellets in his arm (different sizes exist for different types of small critters and birds)? Again, it seems to be a single shot. Birdshot can be fired from a shotgun, a rifle or a handgun.
From what we know, no one else reported hearing these gunshots. I note this because the reports are that - from statements LE have made - there was more than one 911 call in the TB incident.
The TB incident has at least one shot. The coroner said (he 'believed') there were not multiple gunshots. On WS, we've pointed to two holes in the tent but we don't know if those holes are connected with the shooting. But TB was shot while inside the tent and the bullet had to come from somewhere.
If it was a shotgun in the TB killing, you'd have more than enough reason to think the shootings might be linked. It appears that in the MT incident, someone approached her car and fired a single shot with a shotgun at close range. Is that what happened with TB?
If TB was shot by a rifle, you might not link the shootings but start looking further afield as to who might have fired a shot out in the canyon at night. Rifles have a much longer range than shotguns and the stray/random/idiot-shooting-at-the-moon scenario is a possibility here. (It's also possible that it was used in the campground in the manner of the MT shooting - walk up to the tent and shoot.)
If it was a handgun, you'd also have to consider that it was fired from within the campground. And then you wonder if there was some kind of nightlight on in the tent (for the kiddies) that allowed its occupants to be discerned from outside.
From the public safety POV, it sounds like we have to be on the lookout for someone walking up to campers in the early-morning hours and firing a single shot. This is different than someone shooting from a car or surrounding property.
Having this information available would in no way compromise the alleged integrity of the investigation.