Defense in Chase murder case hints at consensual sex
BOULDER, Colo. -- The defense for the man accused in the slaying of Susannah Chase more than 10 years ago hinted Thursday at consensual sex between the Greenwich High School graduate and the defendant.
A legal argument over the condition of the sperm found in Chase's body -- which goes to the heart of the defense's case -- erupted in court Thursday morning.
The implication of the dispute, according to the defense, is that Diego Olmos Alcalde, 39, had consensual sex with Chase days or weeks before she was attacked on Dec. 21, 1997, and that the evidence supporting that possibility should be made known to the jury.
They argue that a lab technician at Boulder Community Hospital analyzing slides from Chase's sex assault exam found non-motile sperm -- sperm that does not swim robustly or at all. They said sperm remains motile for only a limited amount of time, indicating the possibility that Chase had sex well before the attack.
Prosecutors say that sperm found in Chase matched DNA submitted by Alcalde while he was serving a prison sentence for an unrelated crime.
The defense didn't outright state that their client had had sex with Chase, but their argument before the judge strongly indicated that the age of the sperm found in the 23-year-old University of Colorado student was critical to their case.
Prosecutors say the information about the state or freshness of the sperm found in Chase comes from a Boulder police detective, who heard it from the lab tech.
And because records of who that lab tech was have long been destroyed, the prosecution contends that any statement about the motility of the recovered sperm would be hearsay and thus inadmissible in court. There is no written record of the conversation between the detective and the lab tech either, lawyers said in court.
Boulder District Judge James Klein agreed with prosecutors and said he won't allow any questions regarding the lab technician's statement to police into the trial.
"We don't know who that is and I'm supposed to let that in?" Klein said to the defense attorneys, as the dispute heated up.
Olmos Alcalde lawyer Mary Claire Mulligan accused the prosecution of trying to "hide" evidence from the jury.
Lynn Kimball, a nurse who works as an expert in sexual assault exams, testified Thursday that she didn't see any obvious signs of sexual trauma when she examined Susannah Chase the morning of Dec. 21, 1997.
But she said the conditions for the exam weren't ideal and she had to work under abnormal time pressures and without certain pieces of equipment she normally used. She said the fact that there was no trauma evident to the naked eye didn't mean Chase hadn't been sexually assaulted.
"Not finding genital trauma does not in any way rule out sexual assault," Kimball said.
Earlier Thursday, a sex assault examination expert told the jury that sexual assault does not always cause female genital injury.
Anissa Jones, a registered nurse, said a woman's body may respond sexually to penile penetration even if the sex is not consensual.
Jones said this would be even more likely if the woman is incapacitated and cannot resist the perpetrator.
As a result, physical injury to the female genitals may not manifest as a result of non-consensual sex.
Jones did not examine Chase, but was called to the stand by the prosecution as an expert witness.
Her testimony delved into detailed discussion about sexual intercourse and female genitalia.
Mulligan, Olmos Alcalde's lawyer, cited a study in which 70 percent of sexual assault victims who had sustained non-genital injuries also had genital injuries.
The subject of sexual assault is key in the Chase case because prosecutors say Chase was raped after she was attacked while the defense insists she wasn't raped.
The nurse who examined Chase as she was brought into Boulder Community Hospital's emergency room the morning of Dec. 21, 1997, said she began to suspect that Chase may have been sexually assaulted once her pants were removed.
Patricia Landon told the jury Chase's underpants were askew, with one side yanked up high on her hip and the other rolled and bunched up in her crotch. She said Chase's jeans had been pulled all the way up and snapped shut.
Landon testified that it was hard to determine Chase's gender when she was first rolled into the hospital because she had so much blood around her face. She described Chase's hair as frozen in blood and vomit.
She was also cold to the touch, Landon said.
Landon was then cross-examined by Mulligan, Olmos Alcalde's lawyer, who asked her if she had described the state of Chase's underpants in a different way years ago than she had in court this morning.
Mulligan said Landon didn't describe the underpants as being pulled up and askew at the time Chase was brought into the hospital.
Landon said a police report describing her characterization of what the underpants looked like was a summation of what she said, not her own report. She said she didn't see a distinction in the two descriptions.
Mulligan also questioned Landon's motive in the case, citing a conversation the nurse had with prosecutors a month ago where she said she was "very invested" in the case and wanted to testify.
Landon acknowledged the conversation but said she never told the district attorney's office that she wanted to see someone punished for Chase's death.
Also testifying Thursday were Boulder Police Detective David Spraggs, Denver Police Officer Rick Guzman and Boulder Police Cmdr. Curtis Johnson.
The trial will resume Friday morning.
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