| Professional hit / false flag / not a bullet | Alternate mechanism | Contested | none yet | |
| Robinson was the lone rooftop shooter | Official case | Contested | | |
| Bomb dogs were kept away | Alternate mechanism | Contested | none yet | |
| FBI revived comparative bullet-lead analysis | Official case | Contested | | none yet |
| Death text: they are going to kill me | Motive | Contested | none yet | none yet |
| Pierre Falcone as mastermind | Foreign state | Contested | none yet | none yet |
| Frangible or exploding bullet | Alternate mechanism | Contested | | |
| Fort Huachuca meeting the day before | TPUSA / insider | Contested | none yet | none yet |
| Kolvet: it was supposed to be you | TPUSA / insider | Contested | none yet | none yet |
| Exploding Røde microphone / shaped charge | Alternate mechanism | Contested | none yet | |
| St. Michael necklace as explosive residue | Alternate mechanism | Contested | none yet | |
| Bill Ackman ran a June 2025 intervention that led to the killing | Foreign state | Contested | | none yet |
| Egyptian military flights tracked Erika and were at Provo on 10 Sep | Foreign state | Contested | none yet | none yet |
| Cox's 'Discord messages' were not Discord | Fabricated digital evidence | Contradicted | none yet | |
| Shot created a great risk of death to others | Official case | Contested | | none yet |
| Kirk thought he was a time traveler and was marked as a child | Patsy / wrong shooter | Contested | none yet | none yet |
| Kirk was targeted for political expression | Motive | Contested | | |
| Groyper / Nick Fuentes motive | Motive | Contested | none yet | |
| France / French Foreign Legion ran the hit | Foreign state | Contested | none yet | none yet |
| Israel / Mossad ordered the killing | Foreign state | Contested | | none yet |
| Robinson is a patsy and did not fire the shot | Patsy / wrong shooter | Contested | | |
| Kirk's security team was in on it | TPUSA / insider | Contested | none yet | |
| TPUSA money and security failures explain the death | TPUSA / insider | Contested | none yet | none yet |
| Roommate texts were written by federal agents | Fabricated digital evidence | Contested | none yet | |
| Transgender ideology was the motive | Motive | Contested | none yet | |
| WSJ 'trans / antifa slogans' casing bulletin | Motive | Contradicted | none yet | |
| Second gunman because of the holster | Professional hit / extra shooter | Inconclusive | | |
| Zinn was an accomplice who helped the shooter flee | Broader plot | Contradicted | none yet | none yet |