Mo, 57, was so deeply moved by the tragedy that it inspired his first tattoo. With clouds in between rays of sun, the tattoo on his right forearm says: "6 heroes, 20 angels," along with the date of the shooting.
"I wanted people to know how profound that day was to me," said Mo, who was among the troopers inside a room with all the families when they were told their loved ones had died.
A 30-year veteran of the state police, Mo said the only similar experience was a liaison program created after the Sept. 11 attacks, when families of Connecticut victims relied on transportation from state police cruisers to get into New York City. But nothing really compares to his connection with the Sherlach family.
Some days, he would spend hours at the Sherlach house. Other days he would leave them in the company of friends. One of Sherlach's grown daughters is named Maura but goes by the nickname "Mo," and he gave her an old nametag that she was wearing regularly. He also gave Bill Sherlach a state police pin he has worn to legislative hearings and other events related to the tragedy.
At the funeral, Mo escorted the family and stood watch over them during the service. As the service concluded, Mo and Bill Sherlach hugged.
"Bill said, `You're like a brother. You're always welcome at my home,'" Mo said.
Mo made three trips to bring Mary Sherlach's property back from the school, including her car, and he later felt awkward about possibly intruding on such a personal space.
"Mary drove the car to school, and I'm the next person to sit in the car," he said. "I think about it now."
The state police have had group sessions for the troopers to decompress, and Mo said they have been helpful for them to get out their pain and share it among themselves.
Bill Sherlach said he is grateful to Mo for taking such care of his family.
"I can't say enough of what these guys were able to do," he said.
Copyright 2013 Associated Press