When Johnny Depp's Grindelwald descends upon Paris, he has his minions find a beautiful townhouse in the city for him to shack up in. Unfortunately it's still occupied by the muggle husband and wife who own it, so Grindelwald's wizards kill them on the spot. As if that isn't brutal enough, they discover afterwards that the couple has a baby boy, who is happily babbling away in his bedroom.
Grindelwald leans down beside the boy, who's sitting by his crib, and then walks away so that one of his followers can do his dirty work (yes, they Avada Kedavra a baby). The scene is eerily reminiscent of the flashbacks we see in the Harry Potter films, of Harry's last night with his parents. Both Lily and James Potter are killed before Voldemort attempts to take out baby Harry in his crib a well.