His sister must have been out of touch with what he had become.  A white racist who had it out for Hispanics so much that he murdered three innocent ones in Walmart cold blooded.  

Several neighbors remarked that he often expressed dislike for Hispanics to their faces.

One man, Gerald Burnett, told CBS4 investigator Rick Sallinger that Ostrem would say “’This is America. You shouldn’t be here.” Burnett added, “That’s no way to treat people.”

A Hispanic employee of the apartment building, who did not want to be identified, said Ostrem was very rude. “If he saw a Hispanic person, he would tell them to get out of his way,” he said.

All three who died at the Walmart had Hispanic names.

http://denver.cbslocal.com/2017/11/02/suspect-neighbors-walmart-shooting/