He didn't send angels to find out what was going on. He went to Abraham in Sodom and Gomorrah Himself:
Genesis 18:20-21
20 Then the Lord said, “The outcry against Sodom and Gomorrah is so great and their sin so grievous 21 that I will go down and see if what they have done is as bad as the outcry that has reached me. If not, I will know.”
He didn't send angels to find out what was going on. He went to Abraham in Sodom and Gomorrah Himself:
Genesis 18:20-21
20 Then the Lord said, “The outcry against Sodom and Gomorrah is so great and their sin so grievous 21 that I will go down and see if what they have done is as bad as the outcry that has reached me. If not, I will know.”