We-with a soul-do not expire with the destruction of the body.
The body housed the soul in order for the soul to achieve what it was sent down to this world to accomplish.
When the soul finishes its work, it can gladly return to Heaven, content to snuggle near G-d, unencumbered by an earthly body.
May the Almighty comfort Leiby's family and friends amongst the mourners of Zion and Jerusalem.
....and may we immediately welcome the day when no tears of sadness or mourning will ever appear...