DNA ties man to '87 slaying 12/20/2002 Associated Press HOUSTON - Advances in DNA technology gave authorities the breakthrough they needed to arrest a Houston man in the stabbing death of his sister-in-law 15 years ago. Harris County authorities arrested Gregory Glenn Markwardt, 50, on capital murder charges Wednesday at his home. Mr. Markwardt is accused of killing Kathryn Louis Odom on March 3, 1987. Her battered body was discovered in her Spring home with her two young children. Investigators describe the crime as a "lust murder," saying Mr. Markwardt made romantic advances to Ms. Odom, but she rejected...