What is the ruling on shortening the prayer for a prisoner?

Question:
We are presenting this question to you with the intention of seeking the truth in a matter in which the brothers in the Algerian prisons have divided into two groups. Given the circumstances, many, many brothers have been imprisoned, some of whom participated in armed operations and others who provided them with support. What is the method of their prayer: do they complete it or do they shorten it? It is known that some of them reside in the same city where they are imprisoned, while others are transferred to a prison far from their city. And if the ruling is to complete the prayer, what is the ruling for one who shortened it for a long period, perhaps exceeding several years? Please answer us with a sufficient and comprehensive answer with the evidences and proofs from the Shari'ah. We hope that the answer will be in writing so that the benefit is general for everyone. Please be generous with us in the details, in the details, and do not forget us in your righteous supplications. Allah is the helper of the servant as long as the servant is the helper of his brother. Thank you.

Answer:
Yes, if these prisoners came from a distance, if they were brought from a far distance, a distance of shortening, and were imprisoned, then here we look at whether they do not know when they will be released. If they do not know when they will be released, it is possible they will be released soon or after a long time, then they shorten the prayer because they did not intend to reside. But if they know that they will reside for a long period in prison, that they are sentenced to a long period and they know this, then they complete the prayer because they have become residents and the state of travel has ended for them. And we ask Allah for them that He may release them, facilitate their affairs, support Islam and the Muslims, and cause the enemies of the religion to fail. Yes.