And David commanded his young men, and they slew them, and cut off their hands and their feet, and hanged them up over the pool in Hebron. But they took the head of Ishbosheth, and buried it in the sepulchre of Abner in Hebron. (2 Samuel 4:12)
A public place, where the bodies would be seen by all. The mutilation of the bodies added further disgrace to the criminals, and the hanging up of the corpses at the public pool gave maximum publicity to the event. Such a treatment would serve as a terrible warning to all that such crimes would not be condoned.
The head of Ish-bosheth.
As an individual Ish-bosheth had shown himself guilty of no dishonor, and there was no reason why he should not be accorded an honorable burial.