The man charged with killing 20-year-old University of Iowa student Mollie Tibbetts is an illegal alien from Mexico who has been living in the U.S. illegally for up to seven years.

Tibbetts' disappearance caught the nation's attention last month when her father and boyfriend issued public appeals for her safe return.

She was found in a field covered with corn stalks not far from where she was last seen jogging on July 18. Police say they were led to the location by 24-year-old Cristhian Bathena Rivera, who admitted to dumping her body there. He claims to have no memory of what happened to her.

Iowa Dept. of Public Safety

The Des Moines Register says Rivera had been working at a nearby farm for several years. The owners say Rivera passed the government's E-Verify employment verification system, despite his status as an illegal immigrant.

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Many Americans have had enough of the crime being committed by immigrants who enter this country illegally and want it to stop. The left-wing idea of abolishing ICE is ridiculous, and delays in building a border wall are unacceptable. It becomes increasingly difficult for the opposition party to continue to oppose the construction of a wall, particularly since they used to advocate for it. Make them accountable in November if they do.

After all, Senator Elizabeth Warren used Tibbett's murder as a chance to offer a grandstanding defense of the "rights" of illegal immigrants:

We've been numbed by the senseless killings that have become routine in places such as Chicago. We watch in horror as once-safe places such as Long Island are now terrorized by MS-13 gang members. But the loss of innocence in a place such as Brooklyn, Iowa, where before last month residents didn't lock their doors at night but now do is chilling.

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We must fight sanctuary for illegal criminals, and we must build the wall to protect our citizens from the drugs and violence that many of these invaders bring with them.

Barry Richard is the host of The Barry Richard Show on 1420 WBSM New Bedford. He can be heard weekdays from noon to 3 p.m. Contact him at barry@wbsm.com and follow him on Twitter @BarryJRichard58. The opinions expressed in this commentary are solely those of the author.