Jon M. Bartlett, the police officer accused of terrorizing Frank Jude Jr. with a knife and kicking him so hard in the head that bones crackled, was accused of using excessive force three times against other black men - one of them fatally - in five years with the Milwaukee Police Department. Officer Daniel L. Masarik, who is charged with kicking Jude repeatedly in the groin and head, used a Taser stun gun on six suspects in 11 weeks last year. One of those suspects accused Masarik of saying he "enjoyed" beating up the suspect's brother. Bartlett, Masarik and a third officer, Andrew R. Spengler, were charged last week in the attack on Jude. The criminal complaint says Jude's pants were cut off, his fingers were pulled back, a pen was jammed in both ears, a gun was put to his head and a knife to his throat as he lay facedown in a Bay View street on Oct. 24. Jude, who is black, said racial slurs were used repeatedly by the white men. Bartlett, Masarik and Spengler respectively face up to 22 1/2 , 19 1/2 and 3 1/2 years in prison if convicted. District Attorney E. Michael McCann said 10 off-duty officers were at the scene and more people could be charged. Witnesses said a dozen men who identified themselves as off-duty officers beat Jude.