According to Shelly, things massively deteriorated when Easom-Cooper turned 18.
During the grips of a psychotic episode, he left Highbury Hospital - where he was due to be sectioned - to kill a friend before he was stopped.
In July 2022, he was sectioned by the hospital - run by Nottinghamshire Healthcare NHS Foundation Trust - for three months, but Shelly says she told staff he was not ready to be discharged.
"He was not OK when he was released," she said. "There was no way he was going to take his medication and I told them that... it was literally just a time bomb waiting to happen."
Easom-Cooper was placed in accommodation managed by a housing association, but Shelly said he was "unravelling" in the seven months he was there, and not taking his medication while under the care of the trust's community team.
Shelly remembers her shock and frustration when she learned about her son's knife attack.
"I just bloody knew this was going to happen," she said.
"I'm so sorry it happened. I really am. And as a mother, he's my son and he did that and that makes me feel quite ashamed."