A rapist paroled a year ago after being declared "not sexually dangerous" was back in custody Tuesday, charged with luring two women with the promise of jobs, then killing them and burying one in his yard.

Michael Kelley, 35, was denied bail Monday and ordered to undergo a psychiatric evaluation.The district attorney's office said it was awaiting test results to determine if Colleen Coughlin, 21, and Debra Levangie, 24, both of Plymouth, were sexually assaulted before they were killed.

Prosecutor Paula Sullivan-Miller said Kelley admitted killing Coughlin and made "incriminating" statements to police about the death of Levangie.

Kelley wore a bulletproof vest to his arraignment. Police had received threats on his life.

The case has renewed a debate in Massachusetts over whether sex offenders can be rehabilitated.