A serial sex offender who was arrested earlier this year for fleeing his parole supervision was released from prison again last week -- and he promptly went on the lam, authorities told ABCNews.com.
Rickey Allen Robbins, who has a history of rape and viewing child pornography, was released from the Oregon State Penitentiary Dec. 10, and on Dec. 12 a warrant was issued for his arrest for failing to meet with his parole officer.
"I am extremely concerned about public safety," said his parole officer Fawn Teague. "If anyone sees Robbins they need to call 911, stay away and don't try to apprehend him."
This is not the first time Robbins, 58, has violated his probation terms.
In 1983, Robbins was convicted and served time for breaking into an Oregon woman's home and raping her. The victim was able to escape, shoot Robbins and help apprehend him. When Robbins was let out on parole in 2007 he fled from his parole supervision.
Authorities said that while Robbins was on the run he traveled to upstate New York, where police eventually linked his DNA to a hat found outside the home of a woman who had reported having her legs rubbed by a stranger who had broken into her house while she slept.
Police later found another report of a similar incident in the same area in which a victim reported having been woken up and held down by a male suspect who told her "sorry" before he fled.
Robbins was apprehended again in May 2008 when he was found viewing child pornography in a university library in New Orleans, according to Oregon police.
Oregon authorities declined to elaborate on the child pornography charges and would say only that Robbins was extradited back to Oregon where he served time for the probation violation.
Scott Berkowitz, the president and founder of Rape, Abuse & Incest National Network, or RAINN,, was discouraged to hear about Robbins' disappearance.
"Sadly, this is not an isolated incident," said Berkowitz in an e-mail message sent to ABCNews.com. "There are currently hundreds of thousands of missing sex offenders in the U.S., and this latest case in Oregon only goes to show the need for tougher penalties and longer prison sentences for convicted sex offenders."
"Rapists are often repeat offenders, and the longer we can keep them in jail behind bars, the safer our streets will be," he said.
Authorities in Oregon declined to specify under what conditions Robbins was released from prison and whether it had anything to do with prison overcrowding or if he had simply completed his sentence.
The Oregon Department of Justice also declined to comment on the case.
On Dec. 10, Robbins was released again from the Oregon State Penitentiary and had followed instructions to take a bus from the institution to see Parole Officer Teague.
Teague said that she instructed Robbins, who was homeless when he was released from prison, to reside at a local mission for the time being. Teague declined to comment on Robbins' demeanor during their meeting but did say that it's not uncommon for parolees to "tell us what we want to hear."
"I called the mission Thursday to confirm that he had stayed the night, which he had," Teague said. "But on Friday morning he failed to report to me, and I called the mission and they said he hadn't slept there Thursday."
"That's when we immediately requested a parole board warrant for Robbins," she said.
Teague said Robbins' crime-ridden past makes her "extremely concerned" that he's a danger to public safety.
Part of Robbins' parole package, according to Teague, is that he register as a sex offender within 10 days of his release from prison. Teague said that Robbins had not yet done so at the time of his disappearance.
Other provisions of his parole include being prohibited to contact minors and being required to undergo sex offender treatment.
Teague said that there are no leads in Robbins' disappearance and that authorities are not sure whether he is armed or under the influence of narcotics or alcohol.
Robbins has a thick salt-and-pepper beard, is 5 feet 10 inches tall, and weighs 170 pounds.