After his arrival in Florida, Caine joined the Miami-Dade Police as a homicide detective but later transferred to the bomb squad, where he was mentored by Al Humphries, an older cop whom Caine highly respected and considered a good friend; Humphries was later killed after accidentally triggering a bomb he was attempting to disarm.
Nakon njegova dolaska u Floridi, Horatio se pridružio policiji Miami-Dadea kao detektiv u Odjelu za ubojstva, ali je prebačen u bombašku ekipu, gdje mu je mentor bio Al Humphries, stariji policajac kojeg je Horatio jako poštovao i smatrao dobrim prijateljem; Humphries je kasnije poginuo slučajno aktiviravši bombu koju je pokušavao demontirati.