2 Peter 2:4 ESV
For if God did not spare angels when they sinned, but cast them into hell and committed them to chains of gloomy darkness to be kept until the judgment;
This line from the New Testament which is accepted scripture by the Catholic Church does state that devils are already in Hell, with some in chains.
You may be interested in the article titled "Enoch's Interactions With Fallen Angels" by Teresa Seputis.
Enoch is mentioned with high regard within the Old and New Testaments of the Catholic Bibles. The Book of Enoch also helps to make sense of our beginnings, advancements, and the Nephilim mentioned in the Old Testament.
Enoch had multiple visions of hell, where the fallen angels were to one day be imprisoned. Chapter 18 verses 12b - 16 describes one of them, "And beyond that abyss I saw a place which had no firmament of the heaven above, and no firmly founded earth beneath it: there was no water upon it, and no birds, but it was a waste and horrible place. I saw there seven stars like great burning mountains, and to me, when I inquired regarding them, The angel said: 'This place is the end of heaven and earth: this has become a prison for the stars and the host of heaven. And the stars which roll over the fire are they which have transgressed the commandment of the Lord in the beginning of their rising, because they did not come forth at their appointed times. And He was wroth with them, and bound them till the time when their guilt should be consummated (even) for ten thousand years.'
In Chapter 21, Enoch is terrified of Hell and of the flaming abyss he saw there and called it a "spectacle of the pain."
You can read the Book of Enoch here: The Book of Enoch.
Now what does the Lord mention in the Bible?
Well in the Story of Lazarus and the Rich Man Jesus is NOT talking in a parable because He mentions real people's names. In none of the parables does he use the names of real people. Jesus is informing the crowd (bear in mind that this is before the death of Jesus) that Lazarus and Abraham are currently in Heaven, and that the Rich Man is currently in Hell.
In the account of the death of Jesus, Jesus says to the man who accepts Him, "Today, you will be with me in paradise." That means as soon as Jesus died He was in Heaven. When the man who ackowledge Him died, he was in Heaven. But when the other man who cursed Jesus died, he went straight to Hell.
The following article contains the testimonies of 5 Catholic saints who have seen hell in spiritual visions: 5 Saints Who Had Terrifying Visions of Hell.
These saints are:
- Bl. Anne Catherine Emmerich: “No one could behold without trembling
- St. Teresa of Avila: “On fire, and torn to pieces”
- St. John Bosco: “Indescribable terror”
- Sr. Lucy of Fatima: “Shrieks and groans of pain and despair”
- St. Maria Faustyna Kowalska: “A place of great torture”
According to Sr. Lucy of Fatima, the devils are in Hell torturing human lost souls.
So, devils are in Hell. But they cause human suffering. After God's final judgement, both devils and humans suffer together in the eternal lake of fire according to the Book of Revelation.
Here are two articles from the Catechism of the Catholic Church, Second Edition:
391 Behind the disobedient choice of our first parents lurks a seductive voice, opposed to God, which makes them fall into death out of envy. Scripture and the Church's Tradition see in this being a fallen angel, called "Satan" or the "devil".The Church teaches that Satan was at first a good angel, made by God: "The devil and the other demons were indeed created naturally good by God, but they became evil by their own doing."
1035 The teaching of the Church affirms the existence of hell and its eternity. Immediately after death the souls of those who die in a state of mortal sin descend into hell, where they suffer the punishments of hell, "eternal fire." The chief punishment of hell is eternal separation from God, in whom alone man can possess the life and happiness for which he was created and for which he longs.
You can read about the Seven Teaching on Hell from St. Thomas Aquinas on this blog post:https://blog.adw.org/2020/06/seven-teachings-on-hell-from-st-thomas-aquinas/.
Here are the seven points:
- Does God love the souls in Hell? Yes.
- Is there any good at all in Hell? Yes. Are all the damned punished equally? No.
- Do the souls in Hell repent of what they have done? No, not directly.
- Is eternal punishment just? Yes.
- Do the souls in Hell hate God? No, not directly.
- Do the souls in hell wish they were dead? No.
- Do the souls in Hell see the blessed in Heaven? Summa Theologica, Supplement, q 98, art 9
Here is the quote from Summa Theologica, Supplement, q 98, art 9:
The damned, before the judgment day, will see the blessed in glory, in such a way as to know, not what that glory is like, but only that they are in a state of glory that surpasses all thought. This will trouble them, both because they will, through envy, grieve for their happiness, and because they have forfeited that glory. Hence it is written (Wisdom 5:2) concerning the wicked: “Seeing it” they “shall be troubled with terrible fear.”
After the judgment day, however, they will be altogether deprived of seeing the blessed: nor will this lessen their punishment, but will increase it; because they will bear in remembrance the glory of the blessed which they saw at or before the judgment: and this will torment them. Moreover, they will be tormented by finding themselves deemed unworthy even to see the glory which the saints merit to have
Bill Wiese has written an excellent book on the topic of Hell called 23 Questions About Hell: https://amzn.to/3Le3HwJ. I have personally read this book, and it makes 100% complete sense and answers many of the difficult and common questions that people have. Here is the list of 23 questions that are answered in his book:
- Isn't God mean for making hell?
- You Christians are narrow-minded; isn't there more than one way to heaven?
- Wouldn't God be mean and unloving for not allowing a good person into heaven?
- Wouldn't you say God is unloving for sending people to hell?
- Doesn't science dictate that man came from the animal kingdom?
- Where was God when the disaster (earthquake, tsunami, hurricane, etc.) struck?
- If there is a God, then why is there suo much evil in the world?
- Seventy years of sin - does that deserve an eternity of punishment?
- Didn't Jesus preach love and acceptance?
- Isn't preaching "hell" using scare tactics?
- Doesn't God consider my heart? I mean well!
- What about the person in the remotest part of the jungle who never heard of Jesus?
- Isn't everyone God's child?
- Can't God overlook my sins?
- Can't God just create another place for man to go besides hell?
- Wouldn't most people in hell agree to accept the Lord if given the chance?
- Can't God just put a stop to the evil that is occuring?
- Is the fire in hell real or metaphorical?
- Why are demons themselves not in torment?
- Since God is a loving God, all who reject Him are annihilated (and not left to suffer eternally), right?
- How does the Christian religion differ from any other?
- Is it fair for someone to live a wicked life and at the last moment "get saved"?
- How can I be assured I won't go to hell?
As you can see, regarding Hell and questions, this book is comprehensive. But if you want a very detailed King James Version refernced book on Hell that takes you through the various scriptures that teaches us about Hell, then you will want to read the book by Bill Wiese called Hell: https://amzn.to/3FIOcvE. It is a thick book and hard to get through. But is a really interesting read. There are so many KJV references on the topic of Hell and I would say that from a Biblical perspective, that this is an authorative text. In this book, Bill discusses the "Spirits in prison" and the devil and demons on Earth and in Sheol.
Father Jose Maniyangat of St. Catherine of Sienna Catholic Church in Orange Park, Florida had a near death experience in which his guardian angel excorted him to hell, then purgatory, and then finally heaven. You can read his testimony here: http://www.courageouspriest.com/priest-sees-bishops-priests-heaven-hell-death-experience. This is what he had to say about hell:
A Visit To Hell
First the angel escorted me to hell. It was an awful sight! I saw Satan and the devils, an unquenchable fire of about 2,000 degrees Fahrenheit, worms crawling, people screaming and fighting, others being tortured by demons. The angel told me that all these sufferings were due to unrepented mortal sins. Then, I understood that there are seven degrees of suffering or levels according to the number and kinds of mortal sins committed in their earthly lives. The souls looked very ugly, cruel and horrific. It was a fearful experience. I saw people whom I knew, but I am not allowed to reveal their identities. The sins that convicted them were mainly abortion, homosexuality, euthanasia, hatefulness, unforgiveness and sacrilege. The angel told me that if they had repented, they would have avoided hell and gone instead to purgatory. I also understood that some people who repent from these sins might be purified on earth through their sufferings. This way they can avoid purgatory and go straight to heaven. I was surprised when I saw in hell even priests and Bishops, some of whom I never expected to see. Many of them were there because they had misled the people with false teaching and bad example.
This testimony matches up with testimonies from Bill Wiese, Mary Katherine Baxter, and hwa bi Jung.
hwa bi Jung is interesting as an artist, as God allowed her to see Heaven and Hell. The reason she was chosen is because electronic equipment cannot be used to film what is in Heaven or Hell. And so God chose her as an artist to show the human race what Heaven and Hell are really like in picture form. In her paintings of Hell, she has seen devils torturing humans. You can view her official channel here: https://www.youtube.com/channel/UCDGpqjJ_J_Bu3ooEKp7wK-w/featured.
You may also want to view these Bible verses on Hell: https://www.openbible.info/topics/hell, these verses on devils: https://www.openbible.info/topics/devils, these verses on demons: https://www.openbible.info/topics/demons, these verses on purgatory: https://www.openbible.info/topics/purgatory, these verses on angels: https://www.openbible.info/topics/angels, these verses on Heaven: https://www.openbible.info/topics/heaven,these verses on the New Earth: https://www.openbible.info/topics/new_earth, and these verses on God: https://www.openbible.info/topics/god.
The Open Bible (https://www.openbible.info/topics/) is an excellent resource for finding what the Bible has to say on a specific topic, as it lists upto 100 verses on the search term. Another favourite of mine is Bible Gateway(https://www.biblegateway.com/passage/) as you can view the same Bible passage in various translations such as KJV, NKJV, NIV, Amplified Bible, Complete Jewish Bible and many more.
It is worth looking at the same verse in different translations, because some translations convey the true message of what's been said more than others.
To conclude, there are many text Canonical and None Canonical as well as Catholic testimonies and None Catholic testimonies that mention Heaven and Hell. And so it does appear, taking 2 Peter 2:4 as truth, that there are already fallen angels in Hell.