Rule 29.1 - Prosecutor's Obligations(a) If the prosecuting attorney has information that a person charged with a crime is imprisoned in a penal institution in the State of Arkansas, he shall promptly seek to obtain the presence of the prisoner for trial,(b) If the prosecuting attorney has information that a person charged with a crime is imprisoned in a penal institution of a jurisdiction other than the State of Arkansas, he shall promptly cause a detainer to be filed with the official having custody of the prisoner and request such officer to advise the prisoner of the filing of the detainer and of the prisoner's right to demand trial,(c) Upon receipt from a prisoner of a demand for trial upon a pending charge, the prosecuting attorney shall promptly seek to obtain the presence of the prisoner for trial.