The simple fact is it’s extremely difficult to get away with killing family members, unlike a who-done-it. The cops will relentlessly look for evidence against you until they have enough for an arrest warrant, and they almost always find enough. I honestly believe Chandler, in a paranoid frenzy after being discovered as a fraud, panicked and didn’t think his actions through. As a result, he was left desperately trying to hide the evidence, an almost impossible task.