ROELAND PARK ? A 19-year-old Roeland Park man is expected to be charged Wednesday in the death of a high school student whose body was found in the trunk of his car, police said.

The victim was Amanda Sharp, 17, of Shawnee, who was a student at Shawnee Mission North High School, said Johnson County Sheriff’s Captain Vince Werkowitch.

Werkowitch said investigators were still trying to determine the relationship between the two, and he declined to say how Sharp died. Investigators would not say how the informant knew about the crime nor what a possible motive may have been.

Officers found Sharp’s body Friday night in the trunk of the suspect’s parents’ car about three hours after he arrived at his family’s home. Investigators went to the home after they got a tip that the man might have killed a girl.

Sharp had missed all her classes Monday. Detectives spent much of the day looking for the suspect because they were relatively certain the girl’s body was in his car, and they did not want to give anyone time to hide the body during the night. The search ended when the man pulled up to his family’s house about 7 p.m.