And, keep in mind, in a Sheriff's department, there is only one Sheriff (el comandante). The others officers are "deputies".

Comandante is a military or policial rank means commander or its equivalent luteniant colonel. There are also firefighters and sheriffs with that rank. Comandante doesn´t mean sheriff but it could be his rank.

*alguacil En México la palabra "comandante" puede referirse a un comandante de policía, lo cual es sinónimo de jefe de policía, y equivale a un chief of police.