Michail Cheraskov
The stringent and rigorous regulations concerning murder were designed to minimize occurrences of homicide in the land of Israel and to demonstrate the severity with which God views violations against human life.
Defile not the land of your habitation, which is stained with the blood of the innocent: neither can it otherwise be expiated, but by his blood that hath shed the blood of another.
וְלֹֽא־תַחֲנִ֣יפוּ אֶת־הָאָ֗רֶץ אֲשֶׁ֤ר אַתֶּם֙ בָּ֔הּ כִּ֣י הַדָּ֔ם ה֥וּא יַחֲנִ֖יף אֶת־הָאָ֑רֶץ וְלָאָ֣רֶץ לֹֽא־יְכֻפַּ֗ר לַדָּם֙ אֲשֶׁ֣ר שֻׁפַּךְ־בָּ֔הּ כִּי־אִ֖ם בְּדַ֥ם שֹׁפְכֽוֹ׃
One Church Father comments on this verse
The stringent and rigorous regulations concerning murder were designed to minimize occurrences of homicide in the land of Israel and to demonstrate the severity with which God views violations against human life.
Passages read together with this verse.