GRAND RAPIDS, MI -- Natasha Maitland burned and destroyed all evidence she had of Steven Deuman Jr. in her life.

She doesn't want any memory of him around -- not of the former boyfriend who orally raped their 15-week-old daughter and didn't get the girl help as she died.

"If I was asked to describe you, two words stick out -- coward and monster," Natasha Maitland said. "You are a monster for what you did to Evelynne, that you would do such horrific things to take her life."

Deuman, 28, was sentenced to two life terms in prison Tuesday, March 5, after he was convicted of murder and aggravated sexual abuse in the infant's death.

Maitland, who was at work when her daughter died, spoke in federal Judge Gordon Quist's courtroom in Grand Rapids before the sentencing.

Testimony at trial showed that Deuman admitted to Maitland that he took a condom from their daughter's mouth the day she died.

The Aug. 12, 2011, death occurred on an American Indian reservation in Suttons Bay in Leelanau County, land held in trust by the federal government for the Grand Traverse Band of Ottawa and Chippewa Indians.

The federal government prosecutes serious crimes on reservations.

Related: Baby's death during rape 'as heinous as it gets,' West Michigan prosecutor says

Assistant U.S. Attorney Phil Green today described the crime as "among the most contemptible and horrific crimes one can commit. He didn't just orally rape the girl. He put her on the floor and left her to die."

"He didn't call 911. He didn't do anything to save her life," Green said.

Deuman has maintained that his daughter's death was an accident.

He placed the infant in the center of a queen-size bed while he went outside for a smoke. He said he placed pillows and blankets to prevent her from falling from the bed, but she somehow rolled over and fell, her mouth landing on a used condom that she breathed in, choking her.

Related: Expert: Infant likely fatally choked by discarded condom, not rape by dad

Maitland, who also has a 4-year-old son, described her daughter as "such a smart and beautiful baby."

"I wish I could come up with words to explain how deeply I hurt," she said. "I will never hear her first words, see her first steps. Evelynne had such great potential before the defendant stole it all away from her."

"You still can't own up to what you did," she said. "You are an evil person and you deserve the treatment you are about to receive."

Deuman spoke briefly, but did not directly apologize.

"There really isn't much to say," he said. "In a way I do feel responsible. My heart does deeply mourn the loss of her. I feel bad for my son because he doesn't get to know his sister."

Quist described the crime as "one of the most serious and perverse crimes that a person can commit."

He said he was troubled that Deuman has not taken responsibility for his acts and suggested that Deuman might be a danger to children if he ever got out of prison.

"He would be very dangerous, in my judgment, at any stage of life," he said.

E-mail John Tunison: jtunison@mlive.com and follow him on Twitter at twitter.com/johntunison