Corrected entry: Odo becomes the prime suspect in the murder as he, being a shapeshifter, could have got between the cracks of the holodeck door in his liquid form. However, no one realises that even if he were the murderer, the murder weapon, a knife, would not have got through the door cracks with him. Odo wouldn't have needed a weapon anyway, as he can turn his arms into tentacles to strangle the victim.
Corrected entry: At Jadzia's insistence, Benjamin goes to find Jake when he doesn't show up for dinner. To do this, he asks the computer for his location. As shown in "Dax" and "Captive Pursuit," Deep Space Nine's computers rely on commbadges to locate specific people, just like on the Enterprise. Jake doesn't wear a commbadge, nor does he appear to have anything similar, so how did the computer find him?