A fourth suspect in the grisly slaying of sailor James Alan Horton 17 years ago has been arrested in New Jersey, authorities said Tuesday.

Douglas Emery, age not given, is charged with murder, kidnapping, criminal sexual conduct and desecration of a corpse, according to Ed Buice, public affairs officer for the Naval Criminal Investigative Service.

Buice said Emery was in the Navy but did not know his rank or how he knew the victim. The arrest was made in Burlington County, N.J.

Horton's body was discovered in a watery ditch in November 1992. Authorities said he had been beaten, tied up and shot in the chest.

The first break in the case came on July 8 when authorities arrested Charles Welty of Missoula, Mont. Welty told investigators that he and others beat, sexually assaulted and shot the suspect, according to an affidavit.

Authorities arrested Thomas Solheim in Suffolk County, N.Y., on July 13. Horton's mother said Solheim was investigators' prime suspect from day one. Investigators told Rosaline Horton that her son found Solheim, his superior aboard the minesweeper Exultant, having sex with another male sailor.

The third suspect was arrested last week. Konnie Glidden of Goose Creek is the only suspect from the Lowcountry.

Reach Andy Paras at 937-5589, aparas@postandcourier.com or on twitter at twitter.com/andyparas.