Mac Morris a.k.a White storm is the former antagonist of Sherlock and the Great escape. 
Mac as a generous thief giving goods to the Poor to England .
And him being the only one to take care of his daughter Katie because his wife died.
Visiting the orphanage where Katie is only a couple of times.
Eventually he would be caught by Sherlock and Watson.
He was actually gonna stop his life of crime.
After learning that Katie would be married to Ronald he decided to escape.
Species wiener dog.