His neighbors say they had no clue a Natomas man was allegedly collecting child pornography and more.

This FBI investigation is apparently revealing a darkside to 44-year-old Alexander Rojas of Sacramento.  

They say they discovered he was soliciting for child porn on Craigslist.  

In one posting, the criminal complaints alleges he wrote online, "(the) younger the girls, the more money" he would pay.

News10 reports that after a raid of Rojas' home, agents say the found child porn on his computer, in his garage, and even worn childrens' underwear in plastic bags hidden in bedroom.  

His neighbors are saying Rojas gave no indication this is what was going on.

They're now reflecting on things like candy he gave to one neighbor's children.