Law and politics go together. Here vare some links:
Since the days of the Law of the Twelve Tables, developed during the early republic, the Roman legal system was characterized by a formalism that lasted for more than 1.000 years.
Early Roman law was drawn from custom and statutes, but later during the times of the empire, the emperors asserted their authority as the ultimate source of law.
Their edicts, judgments, administrative instructions, and responses to petitions were all collected with the comments of legal scholars.
"What pleases the emperor has the force of law." As the law and scholarly commentaries on it expanded, the need grew to codify and to regularize conflicting opinions.
The basis for Roman law was the idea that the exact form, not the intention, of words or of actions produced legal consequences. Romans recognized that there are witnesses to actions and words, but not to intentions. Roman civil law allowed great flexibility in adopting new ideas or extending legal principles in the complex environment of the empire. Without replacing older laws, the Romans developed alternative procedures that allowed greater fairness.
For example, a Roman was entitled by law to make a will as he wished, but, if he did not leave his children at least 25 percent of his property, the magistrate would grant them an action to have the will declared invalid as an "irresponsible testament." Instead of simply changing the law to avoid confusion, the Romans preferred to humanize a rigid system by flexible adaptation.
It was not until much later in the 6th century AD that the emperor Justinian I, who ruled over the Byzantine Empire in the east, began to publish a comprehensive code of laws, collectively known as the Corpus Juris Civilis, but more familiarly as the Justinian Code.
The Ancient Roman law was one of the most original products from the Roman Empire!
http://www.unrv.com/government/laws.php
As the empire developed, the emperor stood at the top of the administrative system. He served as military commander in chief, high priest, court of appeal, and source of law. All this power was intensely personal: Soldiers swore their oath to the emperor, not to a constitution or a flag. Personal ties of patronage, friendship, and marriage had always bound together Roman society, but during the empire the emperor became the universal patron.
Military loyalty, bureaucracy, and imperial succession were all viewed in personal terms. This concentration of power produced a court in which government officials and the imperial family competed with poets, astrologers, doctors, slaves, and actors for the emperor's attention and favor. The emperor's own slaves and freedmen dominated the clerical and financial posts and formed the core of imperial administration just as they did in the household administration of any Roman aristocrat. Deep ties of loyalty bound Roman freedmen and slaves to their patrons so that they faithfully served even the most monstrous emperors.
The emperors took over the Senate's political and legislative power, but they needed the help of senators who had experience in diplomacy, government, and military command. Since the emperor designated candidates for all government positions, senators had no other access to high office except through loyal service. A shrewd emperor could turn senatorial pride and loyalty to the advantage of the empire. By simply allowing senators to wear a broad purple stripe on their togas, for example, the emperor marked them as rulers of the Mediterranean and added to their prestige.
Only when emperors treated senators with contempt did the senators feel justified in conspiring against the emperor under the banner of freedom. Some ambitious senators dreamed of reaching supreme power and even of replacing the emperor. An occasional opportunity presented itself - Nero's death brought four senators to the imperial throne in the single year of AD 69.
However, most senators remained loyal to the emperor because the constant danger of displeasing suspicious emperors outweighed the remote chance of success. As the old noble families died out, the emperors found new blood among the local elite of Italy and the provinces. In the 2nd century AD more than half the senators were of provincial origin.
The emperor Augustus had first given the equestrian order increased responsibilities........
http://www.crystalinks.com/romelaw.html
http://members.aol.com/pilgrimjon/private/LEX/ROME.html
http://ancienthistory.about.com/od/romelaw/Rome_Roman_Law_Government.htm