DIX HILLS, Long Island (PIX11) -- A Long Island man charged with beating his mother could also be charged for the murder of his younger brother.
19-year-old Charles Okonkwo was arraigned on assault charges Friday.
Police say he attacked his mother in their Dix Hills home on July 19.
She was left unconscious with severe head injuries.
The teen's 15-year-old brother was found dead on the same day.
Authorities are awaiting autopsy results before charges are upgraded.
Oknkowo is pleading not guilty in the case.