Questions of their law - So he understood the whole controversy to be.
Worthy of death - By the Roman law. He had been guilty of no crime against the Roman people.
Or of bonds - Of chains, or of confinement.
Matthew Henry
Concise Bible Commentary
God has instruments for every work. The natural abilities and moral virtues of the heathens often have been employed to protect his persecuted servants. Even the men of the world can discern between the conscientious conduct of upright believers, and the zeal of false professors, though they disregard or understand not their doctrinal principles. All hearts are in God's hand, and those are blessed who put their trust in him, and commit their ways unto him.
SDA Bible Commentary (limited)
Volume 1-7
29. Questions of their law. These included Temple regulations (see on ch.21:28) and theological questions (ch.23:6). These matters would seem of little consequence to Lysias (cf.ch.18:15), except as they might lead to a disturbance of the peace.
His charge. Roman law made no provision for such affairs. The lenient treatment Paul enjoyed in Caesarea and later at Rome was no doubt due in part to Lysias’ favorable report.