Imelda marcos; why hasn't she been put in gaol(jail) by president Aquino?

You’ve got to hand it to Imelda Marcos – she puts on a damned good show. Her hubris knows no bounds. Emboldened by her October 1998 acquittal on the graft charges that had kept a lengthy prison term hanging over her head since the early 90s (she never served a day behind bars), and by the 1998 election that brought a pro–Marcos President to power, in the person of Joseph Estrada, she has decided to go for broke. Specifically, to publicly admit to fabulous wealth, after years of denying it, and to flaunt it. The only small obstacle in her path, according to her, is that this treasure trove is not actually in her possession, but that of hitherto trusted accomplices, the infamous Marcos cronies. They’ve got it, but only for safekeeping, according to Imelda, and she’ll move Heaven and Earth to get it back.