The lawyer for a suspect in a gruesome triple murder fears his client's implanted horns and satanic tattoo could turn jurors against him.

Caius Veiovis, 33, will stand trial on September 3 charged with kidnapping, murder and witness intimidation in the 2011 slayings of David Glasser, Edward Frampton and Robert Chadwell.

His two alleged accomplices have already been convicted and sentenced to three consecutive life terms.

But Veiovis' Massachusetts lawyer James Reardon Jr is concerned his client's unique appearance will prevent him from receiving a fair trial.

"There's a serious factor of curiosity and concern when the jury first sees him," Mr Reardon Jr said in Hampden Superior Court.

"I think we have to get it out there."

As part of the heavily inked suspect's signature look, Veiovis had two rows of bumps resembling horns implanted in his forehead with the sequence "666" tattooed in between them, as well as his ears surgically altered to make them more elf-life.

On Thursday a Hampden Superior Court judge said potential jurors could be excluded if they believed they could not act impartially.

Veiovis is accused of helping David Chalue and Adam Lee Hall kidnap, torture and murder the three victims on August 28, 2011.

The victims' dismembered remains were later found in a ditch.

According to police, the trio murdered Mr Glasser to prevent him from giving evidence against Hall, a member of the Hell's Angels bikie gang, in an unrelated case.

The other two victims were simply witnesses to the crime.

Hall, 37, was convicted in February of first-degree murder and kidnapping and sentenced to three consecutive life terms and an additional 42 years.

A guilty Chalue, 47, was also sentenced in May to three consecutive life terms for his role in the triple homicide.

A request by Veiovis, who maintains his innocence, to move the trial's location due to publicity was denied with proceedings to go ahead as planned on September 3.