Genesis 3:10

"The voice of your brother's blood is crying to Me from the ground."

Confronted by God's absolute awareness of all things, Cain was in shock. What he wanted to accomplish in solitude was in fact enacted coram Deo "before God." All things are! (Hebrews 4:13) As his parents, Adam and Eve, discovered as well, there is no successful hiding from the living God. Humanity has been attempting it down to the present day, to no avail. And the blood of victims has been crying to Him who hears, without ceasing.
In particular I am thinking of more than fifty million victims, since the early 1970's, deliberately-taken lives, whose blood continually cries out to God. What America has done in secret will be made known in judgment. God is not mocked (Galatians 6:7). Should the Freedom of Choice Act become law, nullifying all restrictions on abortion in America, this land will be storing up wrath for itself in terrible ways. The righteous Judge of all the earth will do right. He will act on behalf of the innocents.

"Father, it is only by Your great mercy and compassion, for the
sake of the remnant, that You have stayed Your hand thus far.
Our nation is so ripe for judgment, and Your church is so ripe
for Your woodshed. Forgive for Your children's dissatisfaction
with You, and what You provide. Forgive our greed. Call us
back to simplicity, to knowing You are enough.
Grieve our hearts over the killing, the ongoing killing... may we
never "get over" it.
In the Lord Jesus' Name,
Amen."