oxygen Insider Exclusive! Sign Up for Free to View A Colorado woman who was confirmed to testify at a murder trial has now herself been murdered — but police said they do not feel her death is related to her upcoming testimony. Roxann Martinez, 31, was shot to death in Denver last week, the Denver Police Department stated. Her body was found in the street in the city's Hampden South neighborhood, KCNC-TV in Denver reports. Martinez was scheduled to testify for the prosecution at an upcoming murder trial for the 2013 presumed killing of Keslie Schelling, who was eight weeks pregnant when she vanished, Denver outlet KDVR reports. While Schelling's body has not been found, she is presumed dead, and prosecutors have fingered her boyfriend, Donthe Lucas, 28, as her killer. He has pleaded not guilty.