Luke the physician became an investigative historian rather than an eyewitness to Jesus life, Luke meticulously gathered information particularly interviewing Mary J'esus mother for his detailed gospel which he presented as an orderly account based on these testimonies Luke was not only a trained physician but a trained historian conducting thorough research and interviews relying on figures like Mary and other apostles that had walked with Jesus his medical background fostered a disciplined investigative spirit leading him to carefully document events, the detailed infancy narratives in Luke suggest he interviewed Mary the mother of Jesus for information about Jesus birth and early life, in essence Luke was a careful researcher who compiled the stories and testimonies of those who did know Jesus providing a comprehensive and accurate historical record for readers like Theophilus.