CHICAGO (AP) -- Four former members of an elite Chicago police unit have admitted taking part in a brazen operation in which they barged into homes and stole money -- in one case after withholding insulin from a diabetic man until he told him were to find the cash.

The four also admitted that they stopped Hispanic motorists who were driving nice cars, took the drivers' keys and illegally searched their homes, later dividing the money they found.

The four pleaded guilty Friday -- three to felony theft and one to felony official misconduct. All four were sentenced to six months in jail and promised to cooperate in the ongoing investigation.

Friday's court action comes about two years after the department disbanded the unit amid allegations that its members had committed crimes ranging from home invasion and kidnapping to plotting a murder-for-hire.