U.S. Immigration and Customs Enforcement “could have and should have done more to remove (illegal immigrant) Jean Jacques from this country before he had the chance to brutally murder Casey Chadwick,” according to a new report.

The Department of Homeland Security’s Office of Inspector General released a report Monday that analyzed ICE’s failure to deport the Haitian last year following a 17 year prison sentence for attempted murder in a different case, Fox 61 reports.

Jacques came to the U.S. illegally from Haiti in 1996, and complained in a letter for the news site earlier this year about the inability of the federal government to send him back.

ICE officials held Jacques for 205 days after his release, but when the Haitian government repeatedly refused to accept him for deportation the agency simply gave up and released him with very minimal supervision, according to the Norwich Bulletin.

“Jacques was convicted in April of stabbing to death 25-year-old Casey Chadwick on June 19, 2015, in her Norwich home. The killing happened six months after Jacques was released from prison and was living on parole in Norwich. Earlier this month, Jacques was sentenced to 60 years in prison,” according to the news site.

Chadwick’s mother has pushed for new laws to improve deportation procedures in the wake of her daughter’s death. Connecticut U.S. Sens. Richard Bulmenthal and Chris Murphy, along with U.S. Rep. Joe Courtney, requested the investigation into how ICE policies played into Chadwick’s death.

The report contends that ICE officials did not pursue all avenues available to deport Jacques, or exhaust all options to obtain the documents sought by the Haitian government to authenticate his nationality. ICE officials also failed to alert the State Department about Haiti’s reluctance to accept the violent criminal, or to closely monitor his activity once released, the Bulletin reports.

According to the Office of Inspector General report:

The caseloads of Deportation Officers (Dos) in the field make personalized follow-up with the aliens under their supervision functionally impossible. At (ICE Enforcement and Removal Operations) Newark, for example, there are between three and four Dos assigned to approximately 37,000 released aliens.

In addition to the heavy caseload, there is no evidence that ICE used a risk-based analysis for managing caseloads, which would have them expending more time and attention on more dangerous aliens. Instead, officers in the field told OIG that they prioritized cases primarily based on the possibility of removability.

Following Jacques’ release from custody, there is no evidence of Dos at ERO requiring that Jacques acquire additional documents that might have assisted in his removal, even though they had the power to compel him to do so.

“The report provides the most comprehensive and detailed accounting for what happened in this case to date, and the findings are nothing short of alarming,” Blumenthal, Murphy and Courtney wrote in a joint statement Monday. “We will continue to explore the issues raised in today’s report and look for ways to address the unacceptable failings it found. The Chadwick family, the people of Norwich, and the people of Connecticut have our commitment that we will do everything in our power to ensure that the grievous errors that made possible the murder of one of our constituents can never happen again.”

Blumenthal and Courtney also discussed the report with the Bulletin.

“This long overdue investigation … is a record of abject and appalling failure by ICE to deport Jean Jacques,” Blumenthal said. “The report documents numerous significant failures by ICE that could have resulted in Jean Jacques’ removal back to Haiti.”

“Clearly something was terribly amiss,” Courtney said. “There clearly is a systemic problem.”