[berkeleybeej]

Son of Sam was up close and personal. Ditto Zodiac. Guess you could classify Zebra killings as sniper - but that was definately race-based.

[areafiftyone]

Close up only because he used a handgun. That's the only difference and Zodiac and the Son of Sam both taunted police by sending them letters. Son of Sam was even more brazen than this sniper - he walked right up to the car and shot them. Sniper killers all have their own MO but they still fall into the Serial category.