Additional sessions judge Savita Rao freed Pinki, resident of Vishnu Garden, of the charges of murder and destruction of evidence.
"In such circumstances, when the complainant (woman's husband) as well as eyewitness Indrawati, who are the material /star witnesses of the case, themselves have not supported the case of prosecution, no useful purpose would be served by examining the other witnesses for the same outcome in future.
According to the prosecution, on March 29 last year, the minor boy's body was found in the dustbin of a ladies toilet in New Delhi Railway Station and during inquiries at the spot, it was found that it was Pinki's son.
A rag picker had informed officials and other passers-by about the child's body.
A complaint was registered by the woman's husband that she had killed their younger son after he scolded her for not taking care of the child and not taking him to a doctor after he fell down from stairs.