A new analysis by Saqib Rehman, orthopedic trauma surgeon at Temple, and Philadelphia Police forensics experts has found that newer ammunition has become "increasingly prevalent," resulting in grislier injuries. Still, doctors should not focus on figuring out the bullet type, caliber or weapon because even with X-rays and other scans, this information is hard to determine. "The surgeon should individualize treatment on a case-by-case basis and pay close attention to how each patient presents," Rehman said.