According to the Daily Mail, the dad of one of the accused shooters in the STEM attack in Colorado was an illegal alien.

And he had been deported TWICE:

The father of one of the alleged STEM School Highlands Ranch shooters in Colorado is a serial felon and illegal immigrant from Mexico, DailyMail.com can reveal. Jose Evis Quintana, the father of alleged 16-year-old killer Alec McKinney was once jailed for 15 months for domestic violence against Alec’s mother and ‘menacing with a weapon’. McKinney has been charged alongside his friend Devon Erickson of killing one student and injuring eight others at the school close Denver, Colorado.







So, theoretically at least, had we actually enforced our immigration laws, this could have been prevented completely.

Jose Evis Quintana appears in mugshots left, from Douglas County Sheriff's office in Castle Rock,Colorado is undated on the right, from Colorado Dept of Corrections was taken on Nov 16, 2010 while he served his 15mth sentence menacing with weapon. He was deported to Mexico on Dec pic.twitter.com/zqN4sCL61F — Maria Battles (@maria_battles) May 11, 2019

More:

Records show Quintana, 33, who was also deported twice, had a string of arrests in the Colorado dating back from 2008 to 2017. Court papers show that despite Quintana terrorizing Alec’s mother Morgan Lynn McKinney, 32, he managed to convince her to marry him in 2009, a year before he was first deported. Quintana, 33, who admitted to having a history of drink and drug problems, was sent back to his native Mexico on December 9, 2010.

Alec, 16, had posted a message on social media about missing his father, just 11 days before the Tuesday May 7 shooting which saw McKinney and friend Devon Erickson, 18, allegedly kill one student and injure eight others.

It is absolutely absurd for anyone to argue that illegal aliens have a lower record of violent crime than natives – none of that matters because ANY number of crimes from illegals just shouldn’t happen. We have our own problems to deal with, why should we have to take on any criminal element at all from other countries?