A Corning man accused of murdering his mother more than two years ago has changed his plea. 34-year-old Erik Deno has been locked up since October 8th, 2018, when Corning Police were sent to a home off Marguerite Avenue to check on 55-year-old Angelika Deno. A neighbor had called after Angelika’s son, Erik, had come to her door acting strangely and saying he needed help hiding a body. When officers went to the house nobody answered the door and they eventually forced their way in. Officers found Angelika’s body in a trash bin outside. She had been strangled to death. Erik was charged with first degree murder, but was declared mentally incompetent and placed in a mental facility. A judge ordered Deno moved to a state hospital, where he began a regimen of anti-psychotic drugs. Deno was ruled competent to stand trial in October of last year. On Monday he changed his plea from not guilty to not guilty by reason of insanity. He also waived his right to a preliminary hearing, so the case will go straight to trial.