To Kill Someone wearing the same color clothes you're wearing.
The only clues we have now is he was wearing red clothes, maybe it was a homiecide?
(v.) A word used to describe the action of killing a friend or teammate in any video game, regardless of whether it is accidental or intentional.
see also: team killer
*James fires an RPG at Mandy, but misses and accidentally frags his friend, Armando*
Armando: OMG, HOMIECIDE
*Mandy snipes James*
Homie+cide=Homiecide...get it? =]