Jerry Sandusky, the former Penn State University assistant gridiron coach charged with sexually abusing 10 boys over 15 years, asked a judge to throw out the charges on Thursday.
In a pre-trial motion, Sandusky argued that some of the 52 child sex abuse counts against Sandusky, 68, were not detailed enough, others lacked evidence and that a statute of limitations might have expired for eight alleged victims.
Judge John Cleland could order a courtroom hearing on the request after hearing from prosecutors in response.
Defense attorneys also want to delay the scheduled May 14 start of Sandusky's trial, saying they need more preparation time.
Sandusky, who has denied the charges, is confined to his home in State College near the school campus where he was seen by another assistant American football coach in a locker room shower with a 10-year-old boy.
That assistant told iconic Penn State coaching legend Joe Paterno about the incident and Paterno reported it to school superiors but took no further action and was fired by Penn State trustees last November for "failure of leadership" for not doing more once learning of the child sex abuse allegations.
Paterno, the winningest American football coach in US college history, died of lung cancer in January.
Source: AFP American Edition