Valfyl, let us come together and lift up your son's situation in prayer.
Valfyl, in the beginning of your request it would be good to believe in the name of Jesus Christ and abide in Him to be able to ask anything from God and expect that it should be done. Without Jesus there is no access to God, and outside of Jesus there is no salvation. Believing in Jesus we shall receive whatever we ask.
In James 4:8 WEB it says 'Come close to God, and he will come close to you. Clean your hands, you sinners, and purify your hearts, you double minded.' God is willing and waiting to help those who come close to him with a clean and pure heart and ask in Jesus name.
If God is for us, who could be against us, as in your situation, and others like it are specifically allowed by God, to build trust, in Him.
Besides that let us also correct some sinful ways you may have also need to pray for. It does not conform to God's will to imprison criminals and also place them in harm's way, unless they are considered slaves rather than humans made in the image of God. Therefore let us pray not just that Dennis will make it through safely but to also repent from any crime for which they are guilty and be better aligned to God's will.
Believe in the power of prayer to lift them up. And pray for understanding. Please pray that whatever the reason be, a crime, not being able to post a bond, whatever it is may not be swept under the rug by allowing things to go as they are currently but understand the issue as a part of what makes the whole as a society bad in ways that should not be allowed as sinful ways by a Christian believing people.
We will remind everyone it is also commanded in Matthew 25:36 WEB 'naked, and you clothed me. I was sick, and you visited me. I was in prison, and you came to me.' With that we would like to lift this group up to continue to pray. In those verses is a rebuke against calling a sinner a sinner since everyone may be considered sinners and like these need to be in prison. Afterall criminals also need to repent so that they are not punished, better than the results of the devil as stealing, killing, and destroying their very lives. But we also look for another way. This is also known as caring for those that are the worst and criminals of a society. Everyone wants less crime, yet we also show less correction and allow crimes to be fostered for the money they bring in on bailbonds and contracts with the families for bailing them out.
Without Jesus we have no access to the Father and may not be found written in the Book of Life. Here we acknowledge that God hears our cries, please pray this and know that I and our group is here to pray, that would be considered help.
I shall pray this as well, all as prayers are not of my own human desire for the result. I shall, it is our mission to pray prayers without those ungodly desires but only God's will for the situation so let's pray,
Jesus you are our High Priest, to heal Dennis and make a way for more good healing and access for him to feel good on the inside so that he makes the very best decisions going forward. Open our minds to understanding God's will about why those in jail have to be free of easy access to phones and family without what you would have God to have no sorrow. Jesus is the only means for humans to access the Father. Come and wash away all that is not fitting God.
Bring peace into our family and please rebuke any allowing them being in prison in a way to blame them and go on as criminals where they should repent.
Let your Holy Spirit comfort all of you and help you be a firm pillar to help God cause everyone to grow. You will do great things for all who repent.