The initial reports led me to believe they were drive bys with a handgun.
Has the type of weapon used been released?
Were all the victims shot with the same weapon?
Can you fire a high-power .223 from a handgun?
Because in all five in Maryland yesterday, and in the one in DC last night (which has yet to be connected to the MD five) the victim was killed by a single shot from a .223 caliber rifle. And none were head-shots.
If you do a drive-by with a handgun, how many people will you kill outright with a single shot from a handgun? With head-shots disallowed and misses disallowed.
Because the killer(s) are operating like snipers. They quietly move into position, take aim, hit their target at long range with a suppressed weapon, killing with one shot, and quietly make their escape.
I am not trying to suggest any moral equivalency between these snipers and snipers in the military, just that they use the same tactics.