very good points housepainter. best to look at most likely scenario first. all info on this clan points to them being involved in cocaine business. so likely the hit was over something to do with that part of organized crime. as yet there has been no good info as to whom the lopez-oliverio are allied with in mtl if anyone. the journal de mtl article states they had a falling out with rizzuto clan. i take this as the rizzuto/sollecito faction of the mtl mafia. these 2 clans are the only 2 of about 8-10 clans in mtl that are confirmed as being allied. the lopez-oliverio were once allied with them as well during the magot/mastiff years ( 2013-2015 ). as mentioned the lopez bros were acquitted or charges were dropped in 2019, then the attempt of serafino in nov 2021. so that statement points to the rizzuto/sollectio faction being behind the attempt. this however has not been confirmed and no one to my knowledge has been arrested or charged let alone named as being part of hit team.

sooooooo...theories could be.
1. an unknown cocaine trafficking group based in d.r.
2. rizzuto/sollecito faction.
3. an unknown mtl mafia clan that is currently fighting the lopez-oliverio for control of territory in mtl. ( possible the barberio-pizzi clan who also control territory in same r.d.p. mtl east area.)