But several law enforcement officials and researchers who study the transnational gang say the tattoos on Abrego García’s left hand – a marijuana leaf, a smiley face, a cross and a skull – do not show definitive evidence of any gang affiliation. “A tattoo alone, with nothing more, cannot be the single basis to opine someone is a gang member,” said John Colello, who oversees the homicide division for the district attorney’s office in Los Angeles County, where MS-13 got its start during the 1980s.