Scherr's husband was shot at the back of the head and died instantly while her 13-year-old daughter was shot multiple times and bled to death.
"In this case, in this city, under these circumstances, this is the most appropriate consequence. It will help the city to move on in peace," Scherr who has made Mumbai her second home over the past two years, told PTI in an email.
Scherr said while justice can never be fully restored in this case, "a part of it has been laid to rest".
"Now let us be the peace we wish to see in the world. True justice is restored when we join together as one unified whole to live in peace, compassion and love. An irritant has been removed from the city of Mumbai - an unfinished chapter to the 26/11 tragedy," she said.
Scherr said she had been informed that a peace march would be held in Mumbai from three of the locations targeted in the 26/11 attcaks to the Gateway of India.
Thousands of students are expected to walk for peace on November 25, a day before India marks the fourth anniversary of the deadly terror attacks that killed over 160 people, including foreigners, during the three days that Mumbai was held hostage by Kasab and nine other Pakistani gunmen.