The perp does not have a typical Muslim name. His name is more Jewish or Christian than it is Muslim.
Emanuel - in Hebrew is Emanu (is with us) El (God)
His middle name is likely a tribe affiliation. Many names in Africa include the tribe. 'Obama' was Hussein's tribe in Kenya.
Samson - in Hebrew is Shemesh (the sun) On (meaning of the sun)
I'm not saying that he isn't a Muslim, only that his name is not overtly Muslim.