Michael Roseboro was willing to do anything to be rid of his wife so he could marry his mistress, including killing her, investigators said Monday.

Roseboro — arrested Saturday and charged with criminal homicide — had the motive and opportunity to kill Jan Roseboro, the mother of their four children, on July 22 inside their Reinholds home, according to investigators.

They said Roseboro, director of a prominent Denver funeral home, was sexually involved with another woman and wanted to end his marriage of 19 years so he could pursue that relationship, Lancaster County District Attorney Craig Stedman said Monday.

Just minutes before the life of 45-year-old Jan Roseboro ended, her husband called his mistress and told her he was going to tell his wife about the affair, according to court documents.

Michael Roseboro, 41, and 38-year-old Angela Funk, who is married, had an "ongoing" sexual relationship, according to sources. Court documents released Monday confirmed the extramarital affair and included excerpts of e-mail exchanges between the two lovers.

A message sent by Roseboro on July 22, the day his wife died, reads: "I am so deeply, madly and completely in love with you baby."

Investigators said Roseboro killed his wife by bludgeoning, punching, kicking and strangling her before dumping her in the family's backyard swimming pool at 107 W. Main St.

The couple's three youngest children were asleep at the home and their 17-year-old son was at a friend's house when Roseboro killed her, Stedman said.

"He had a motive to kill his wife, he had the opportunity to kill his wife, and he took that opportunity," the district attorney said. Stedman said he believes the slaying was premeditated.

Roseboro has been incarcerated at Lancaster County Prison without bail since early Sunday morning. He will remain there until his case goes to trial.

If he is convicted of first-degree murder, Roseboro would be sentenced to life in prison without parole unless prosecutors seek the death penalty.

Stedman said Monday he has not considered whether he will seek the death penalty.

Stedman expressed his sympathy for the four Roseboro children, who range in age from 6 to 17.

"This is an extremely solemn time. A very serious case, a terrible tragedy," Stedman said. "Four children who have lost their mother because of the choices of their father."

"This is a nightmare for these children. Their one mother gone … and father in jail."

The children have been staying with friends or relatives since their father was arrested at his parents' home at 11 p.m. Saturday.

Investigators stressed that Funk did not take part in planning or executing the murder.

"There is no evidence anyone else was involved," Stedman said.

In fact, Stedman said her decision to come forward and admit the affair was "critical" to charging Roseboro with the killing. He said she "provided a motive for this case."

"She's a real person," Stedman said, "and has admitted to what some would say is wrong."

Funk gave police numerous e-mails sent to her by Roseboro that described their affair.

 On July 15, Roseboro wrote: "I knew from the moment we kissed I knew that I couldn't live without you … I can't live without you in my life. I need to make you my wife, and I need to be your husband. I have never been so sure of ANYTHING in my life …"

On July 17, he wrote: "I dream about seeing you in your wedding dress every day … We say our vows and profess our love to each other and then we kiss. It's a kiss unlike any other we've shared … And I know that as beautiful as my dreams are, they will pale in comparison to the reality of us joining together as one, becoming us. I love you Angela. I can't wait to make you my wife."

On July 22, he wrote: "I have never experienced feelings like this in all of my 41 years … and I know the best is yet to come."

Investigators would not comment on how long Roseboro and Funk had been having an affair. Stedman did say their relationship was "ongoing" and had been for "more than a couple days."

The July 22 e-mail was written and sent just before 8 a.m., about 14 hours before Roseboro allegedly killed his wife.

Investigators and court documents outlined the following events leading to the killing:

Roseboro and Funk had sex between 2 p.m. and 5 p.m. Afterward, Roseboro returned to his Reinholds home and was with his family by their backyard pool.

Roseboro made two phone calls to Funk, the first at 7 p.m. and the second at 8:45 p.m. During the latter call, Roseboro told Funk he was prepared to tell his wife about their affair.

Three of the Roseboro children went to bed and the eldest son left for a friend's house at 9:30 p.m. — leaving Michael and Jan Roseboro alone.

Roseboro likely attacked his wife inside the home before taking her body outside to the pool, investigators said. She was punched, kicked and strangled, but Stedman said the only obvious wound was an "L-shaped" mark behind her left ear. That mark was made with a weapon, investigators said.

After killing his wife, Stedman said Michael Roseboro made "attempts to clean up his handiwork."

Police found cleaning agents and bloody pieces of cloth in a bucket, but no evidence of a struggle inside or outside the home.

Roseboro called 911 about 11 p.m. He told police and medics he found his wife in the deep end of the pool about an hour after he went to bed at 10 p.m.

Investigators believe he cleaned the crime scene before calling 911. Neighbors told police the pool lights were off after 10 p.m. — until Roseboro allegedly turned them back on before police and medics arrived.

Police did a walk-through of the house that night.

When an autopsy the next day indicated Jan Roseboro did not drown accidentally, a homicide investigation began, and the home became a crime scene.

Stedman cited "ethical" reasons for not commenting on whether Roseboro ever told his wife about the affair. Unfortunately, a homicide, not counseling or divorce, was the end result, Stedman said.

"We all would have hoped that (a divorce) would have taken place instead of this," he said. "This is a terrible tragedy … She was a mother to (her children) — a good parent. It's a terrible loss to the community."

E-mail: bhambright@lnpnews.com