Wichita ? The killer didn’t always come out of shadows or act out his depraved sexual fantasies under cover of the night.

After all, Dennis Rader had a family to go home to in Park City, Kan. As his alter ego, BTK, he stalked the streets of Wichita during the day to find ways to relieve his sadistic desires: aroused by the struggle of the helpless and climaxing amid the stench of death.

To most, Rader’s recitation of how he committed his 10 murders during his guilty plea nearly two months ago may have been shocking. But it angered others, including former detectives who knew the true horror of BTK. They didn’t hear in Rader’s words the kind of terror that Nancy Fox and others experienced in their final hours.

When prosecutors present evidence at Rader’s sentencing beginning Wednesday in Sedgwick County District Court, many will be hearing details of the BTK story for the first time.

“Parts of this will be graphic and disturbing,” said Kevin O’Connor, chief litigator for the Sedgwick County district attorney’s office. “But this whole case is disturbing.”

Rader’s admissions during his June 27 plea, as shocking as they may have sounded, simply proved a generic description – a G-rated version of X-rated deeds.

It outraged Al Thimmesch, a homicide captain for the Wichita Police Department from 1977 to 1980. Thimmesch had been to some of the crime scenes. He’d seen the suffering. He heard cowardice in Rader’s plea.

“He never implied, ‘What I did was horrendous. What I did was bad.’ Not once,” Thimmesch said.

To Thimmesch, Rader was trying to sound like a cool, calculated professional, talking of “hits” and “putting down” people, like he had as a dog catcher for Park City.

“It completely dehumanized the effects of what he did,” Thimmesch said.

As Rader found out, fantasy is often more successful than reality. In real life, Rader often bungled acting out his grotesque dreams. He found himself faced with noisy children, nosy neighbors, ringing phones and women who would fight to the final breath to keep him from fulfilling his goals.

Rader would carry through his best plan with the murder of Nancy Fox. That was the one killing Rader would brag about in letters written when he could still hide behind the security of anonymity.

In those letters, Rader would be more brazen than when he had to stand in public and talk about what he did.

The Dennis Rader in those letters is the one prosecutors want to expose at sentencing.

Rader’s public defenders, meanwhile, said they see no need for further evidence, after he admitted his guilt and said he’s willing to accept spending the rest of his life in prison.

But prosecutors and police want the judge and world to know the Dennis Rader who, before his capture, would eulogize Nancy Fox in painfully written poetry and brag of her killing in even worse prose.

Prosecutors and police want Rader remembered as the man who got his kicks out of watching 11-year-old Josephine Otero struggle for her last breath while hanging from a noose.

They want Judge Greg Waller to know the man he’s sentencing is the same person who described the killing of Nancy Fox as an erotic experience.

Investigators are expected to repeat what Rader told them after his arrest in February. He told them more than what he related to Waller in June. Rader got excited, even during his confession.

Prosecutors want Waller to have no doubt before asking him to impose the harshest sentence available in Kansas during the killings, from 1974 to 1991, leaving no chance of parole.