A heated debate over how Charlie Kirk died has turned into a fight over a conspiracy theory, splitting people who follow the case.

• The claim is that Kirk was killed by a small explosive hidden in a microphone, not just a rifle shot.
• Supporters point to his shirt appearing to move oddly and his necklace breaking before he reacts.
• The counterargument is simpler: there was no visible explosion, no smoke, and the shirt only seems to move when the clip is slowed down.
• Former Navy SEAL Rob O'Neill, who killed Osama bin Laden, added fuel by saying the shirt movement looked like an explosion to him.
• Critics of the official story also question why no one gave Kirk first aid and why cameras and SIM cards were quickly removed from the scene.

Outlook: The explosive theory is gaining attention but remains unproven, so expect the online fight over Kirk's death to keep growing.