A bit of searching brought this up; Article 5 is especially pertinent:

https://www.newadvent.org/summa/2094.htm

Thomas asserts God's absolute sovereignty over life and death, saying:

"All men alike, both guilty and innocent, die the death of nature: which death of nature is inflicted by the power of God on account of original sin, according to 1 Samuel 2:6: "The Lord killeth and maketh alive." Consequently, by the command of God, death can be inflicted on any man, guilty or innocent, without any injustice whatever."

All the objections and replies are worth a read, though.