TUCSON, Ariz. — The Pima County Sheriff's Department is reporting the Pima Regional Critical Incident team is investigating an in-custody death that happened Monday. According to a release sent after 11 p.m., PCSD says the Team was conducting its investigation near 6th Avenue and 36th Street. Details are limited at this time, but PCSD says the situation happened after the South Tucson Police Department attempted to take a suspect into custody.