If this is anything like the original, he killed the parents, yes. But the congressman who the kid killed is the one who paid him to do it. So he didn't kill them to get the kid, he killed them to further himself and chose not to kill the kid even tho he was suppose to. And what he means by saying he'll do anything to get what he want while it's flashing back and forth between present and past is it's showing just like how he was willing to kill off the kids family to further his career he is willing to do shit just as fucked up now to keep the him. So keeping the kid alive back then was a whim but now it's turned into a goal to keep him.
If this is anything like the original, he killed the parents, yes. But the congressman who the kid killed is the one who paid him to do it. So he didn't kill them to get the kid, he killed them to further himself and chose not to kill the kid even tho he was suppose to. And what he means by saying he'll do anything to get what he want while it's flashing back and forth between present and past is it's showing just like how he was willing to kill off the kids family to further his career he is willing to do shit just as fucked up now to keep the him. So keeping the kid alive back then was a whim but now it's turned into a goal to keep him.
That's my interpretation.