SOMERVILLE, N.J. (AP) After prosecutors wrapped up their manslaughter case against Jayson Williams, the former NBA star's attorneys asked that charges be dismissed on the grounds the government had not presented enough evidence.

The prosecution rested Wednesday following testimony from a weapons expert who said that the shotgun that killed Williams' limousine driver was working fine, contrary to defense claims that it malfunctioned.

State police Detective Sgt. James Ryan testified that the double-barreled shotgun that killed Costas ``Gus'' Christofi worked properly in eight types of tests, some of which were done up to 10 times.

After cross-examination, the defense entered a motion to dismiss, arguing that not enough evidence was submitted to warrant a trial. The judge set arguments for Monday and Tuesday.

Williams, 36, is charged with firing the shotgun blast that killed Christofi at Williams' mansion in 2002. His attorneys claim that the shooting was purely accidental and that the gun was prone to malfunction.

Williams is also charged with trying to make the shooting look like a suicide. The charges carry up to 55 years in prison.

Prosecutors presented 36 witnesses over 15 days of testimony.

In questioning Ryan, defense attorney Michael T. Kelly questioned what scientific protocol the weapons expert used during the tests, and Ryan said there was none.

Prosecutors claim Williams was handling the shotgun recklessly after drinking with friends. Witnesses said he held it in one hand and snapped it shut, after which it fired.