Complex sentence: The arrests stemmed from the interrogation of Luis Gilberto "El Gil" Sanchez Guerrero, an ex-officer arrested December 29,2008, who allegedly led more than 10 kidnap and murder crews for Tijuana Cartel lieutenant Teodoro García Simental.
Split into simpler sentences: The arrests stemmed from the interrogation of Luis Gilberto "El Gil" Sanchez Guerrero, an ex-officer arrested December 29,2008. Sanchez was allegedly led more than 10 kidnap and murder crews for Tijuana Cartel lieutenant Teodoro García Simental.