Accidentally submitted, here's the continuation.

I remember the first time i laid eyes on young Adolf. The boy could't have been more than 15 at the time. My ears were ringing with such force that i could barely hear, but not because of adrenaline from the prospect of killing a young innocent mass murderer or time sickness; If my plan succeeded i would go down in the time behind time as a legend.

After meeting the hitler family and posing as a secretive, eccentric relative, i set my plan in motion. I became young Adolfus' mentor and confidant ensuring his course as 21st century histories most notorious killer. As he rose in power i remained closely by his side guiding his rule and ensuring that the plethora of instances of deaths that had occurred in innumerable universes would not befall him. As World War II was ramping up, and my retirement was drawing closer, i began to savor the thought of killing my protege. Maybe i had become accustomed and desensitized to murder, but i could almost savor it. On one particularly uneventful night i set my sights on the prize. As Adolfus was dining i slowly approached his chair from the shadows. When i was within arms reach of Adolf i heard that nearly forgotten pop, and felt the blade enter my back as it severed my spinal cord. Before i fell to the ground the time cop dressed in SS regalia attached a dataderm to my neck. My time froze as i became to understand what had happened. My unprecedented and apparently reckless jump so far into the past was too much for the technology to handle and they were unable to rectify the timeline. In order to maintain the integrity of the timeline they send police back to prevent me from murdering a fully actualized hitler...

Meta: I'm not sure i like the ending. i think it explains too much