Suspected blood spots from a missing St. Paul woman's home and car matched her DNA, a scientist with the Minnesota Bureau of Criminal Apprehension testified Thursday at the murder trial of the woman's husband.
Jeffery Trevino, 39, is on trial in Ramsey County on two counts of second-degree murder. Trevino is accused of killing his wife, 30-year-old Kira Steger, who was last seen alive Feb. 21. Her body was recovered from the Mississippi River in May.
BCA scientist McKenzie Anderson told the court that several spots of suspected blood from the couple's master bedroom, home and Steger's car trunk matched Steger's DNA.
Under cross-examination, defense attorney John Conard attempted to cast doubt about the credibility of some DNA results.
Conard noted that professional standards recommend that scientists compare test results to DNA profiles they haven't seen before. He then asked Anderson when she first knew what Steger's DNA profile was.
"It was early on," Anderson said.
Conard asked if she knew Steger's DNA profile before she tested the suspected blood evidence collected from Steger's home and car. Anderson said she did.
Anderson testified Wednesday that Steger was a "single-source" DNA contributor for several pieces of evidence, including stains from the master bedroom, carpet fibers from the bristles of a carpet cleaner, a smudge under the bedroom doorknob and a pillow case recovered from a plastic bag at Keller Lake in Maplewood.
Anderson said Steger's DNA was found on a box spring in the bedroom that had about 150 small spots of suspected blood spatter.
Prosecutors say Trevino killed Steger because she was having an affair with a co-worker and wanted a divorce. Conard believes there are too many holes in the prosecution's forensic evidence.
The prosecution is expected to call its last witness Friday. Trevino must decide by Monday if he will take the stand in his own defense. Jurors could begin deliberating the case Tuesday, the Star Tribune reported.