Mexican authorities searched a second ranch for remains of victims of a drug-smuggling cult believed to have killed at least 13 in human sacrifices. A federal police spokesman said that Serafin Hernandez Garcia, one of four men arrested, accompanied investigators to a ranch 30 miles south of Matamoros that belongs to the owners of Rancho Santa Elena, where 13 mutilated bodies and occult paraphernalia were found. Investigators said the suspects confessed to multiple slayings, including that of University of Texas student Mark Kilroy, 21. Also among the dead were three known drug traffickers, Ezequiel Rodriguez Luna, 27, Ruben Vela Garza, 30, and Ernesto Rivas Diaz, 23. Five mutilated corpses remained unidentified, officials said.