Marie Techlowec Nielsen's body was found by her then teenaged son, Edward (Peter) Barrera, on June 18, 1987, after he gained entrance to their New Britain apartment through a window. (He had earlier given his key to the apartment to his mother who had locked her keys in her car.) The victim's body was found face down on the bed in her bedroom. The cause of death was determined to be asphyxia by strangulation. Follow this link to e-mail the Cold Case Unit with information or a tip about the case of Marie Techlowec Nielsen. Or call the Cold Case Unit toll-free at 1-866-623-8058 or at 860-548-0606 in the Hartford area. All communications will be kept confidential.