And release, and release, and release, and release, and release. . .

Denver Post reports:

Francis Hernandez, the man being held for suspicion of vehicular homicide in the deaths, is now being detained by federal immigration officials.
U.S. Immigration and Customs Enforcement officials sent a faxed detainer on Hernandez, 23, at 12:04 a.m. Saturday, indicating his U.S. citizenship is under question, according to Arapahoe County jail officials and federal authorities.
Hernandez has been arrested 16 times in five years in Colorado but apparently has never been deported, according to Colorado Bureau of Investigation records.
On Friday, Aurora authorities had indicated they believed he was a U.S. citizen.
Hernandez had been arrested in Denver as recently as July 18 on a traffic stop and charged with numerous crimes, including resisting police, CBI records say. Had he been held on an ICE detainer at that time, he would have been jailed until his case was completed and his sentence served and then deported, a time-consuming process.