NYC fiend who killed ex as she pushed their baby in stroller smirks, gives pathetic apology in court — then lands up to life behind bars

The Brooklyn fiend who fatally shot his ex as she pushed their infant in a stroller smirked Tuesday while giving a pathetic apology in court, where his victim’s mom wept — and he landed up to life behind bars.

Controlling killer Isaac Argro, 26, licked his lips and grinned when given the chance to address the...