Idk, this just came out and Russia has denied they fired that missile, saying they hit a weapons factory, not a residential building. Either they fired it and it missed the target hitting there or Ukraine fired it for some reason or Russia fired it and the journalist was at the weapons factory and RFE lied. Either way i dont care, she deserved it. Instead of an innocent ukrainian dying we got a shameless bastard who slanders and lies for money to manufacture consent for wars that kill millions. Also Radio Svoboda (ukrainian edition of RFE/RL where she worked) regularly spreads nazi propaganda, like that Stepan Bandera wasnt a nazi but “just a ukrainian nationalist” and that he was good, which makes it even worse. She didnt need to work there, she could have stayed at the ukrainian TV channel where she worked earlier, which probably lies a lot but at least isnt funded by the fucking CIA. Instead, she showed she had no principles as long as there is good money. Sucks her family lost her but nazis have families too, doesnt mean we shouldnt kill them. Im not crying for her.

But answering your question if what RFE says is true then yes its a war crime undoubtedly.