I am familiar with this horrid gang which originated in Southern Cali. It is one of the most violent gangs in the country.
Sureños Gang Arrests: Why is Sur 13 the most Dangerous Gang in California?
The gang, which is said to be recruiting new blood at its fastest rate ever, specialises in murder, extortion and drug trafficking - leaving a trail of bloodshed across California in its wake.
It has risen from a California-based operation to having tentacles stretching the length and breadth of America.
The Sureno gang takes part in crimes such as homicides, human trafficking, drug trafficking, kidnapping and assaults.
However, the main objectives of the gang are to carry out orders from the Mexican Mafia and distribute illegal narcotics. When Sureno members are asked what being a Sureno gang member entails, they repeat the mantra, "A Sureno is a foot soldier for the Mexican Mafia."
http://www.ibtimes.co.uk/surenos-gang-arrests-why-sur-13-most-dangerous-gang-california-1447071
This gang is a very violent bunch. So if Tavo thought that Natalie or Derek had 'disrespected him in any petty way, he and his crew would have slaughtered the teens without a second thought. It could have also been a drug dispute or a robbery gone bad. I just hope these ****s are taken off the streets or this will happen again.