Motive was never established.
And these are only the ones he got caught for. Who knows what this thug has gotten away with.
Well bottom line is that he is going to be behind bars for life and his fiance is going to have to raise his child penniless because the lawyers are going to get all the money.
But hey, he's got his street cred...and his tats. I guess this is what that subculture calls "keeping it real."