This number could possibly include deaths that involve illegals in car accidents.
Even if you look at roughly 50,000 automobile deaths a year, considering the large swaths of the country where there are almost no illegals, the number of those accidents that are just reckless kids or drunkards killing themselves -
I honestly don't think you can realistically get to 45,000 since 9/11 adding that auto number to murders by illegals.
It is a wild exaggeration pulled out of some guy's butt.