interview captured the lively hitchhiker describing how he saved two victims from a deranged attacker. >> so came from behind with a hatchet, smash, smash, smash. >> reporter: that interview amassed close to 4 h million views on youtube. kai even made a hilarious cameo on jimmy kimmel. >> hey, you're that dude with the hatchet. >> reporter: four months later the homeless hitchhiker became the subject of a massive man hunt for allegedly killing 73-year-old new jersey attorney joseph galfi, jr. >> this man was well known. that doesn't mean he did not or could not become involved in a crime. >> reporter: on the run since monday kai took this picture. his long hair cut off, police say to try and conceal his identity. thursday night police tracked him down at a philadelphia bus station. it's still unclear how galfi and the hitchhiker know each other.