From the news article someone linked:

The woman was allegedly second-in-command in the Los de la M gang, where she was supposedly known for her precise aim and skill with firearms. She gained a reputation due to multiple incidents across Colombia, according to local newspaper Diario del Norte.

She was arrested alongside alleged accomplices “Gorda Sicaria” or “Fat Hitwoman” and a man called “Leopoldo” on Dec. 1 in connection to the murder of her ex-boyfriend Deyvy Jesús García Palomino on July 23. Police said Rodriguez allegedly told Deyvy to meet her to settle a money issue, but once he arrived two men drove by on a motorcycle and shot him.

Details unclear but seems like stereotypical gangster stuff