Q. 1. Is it true that there are sins that cry out to Heaven?
A. 1. Yes. The Catholic Church teaches that there are 4 Sins that cry out to Heaven.
Q. 2. What are these sins?
A. 2. They are:
Willful murder (See Genesis 4.)
The sin of Sodom (see Genesis 18)
Oppression of the poor (See Exodus 2)
Defrauding laborers of their wages (See James 5)