Three may have been involved. in four Burger Chef slaying _SPEEDWAY, Ind. (UPI) — restaurant whose bodies were Burger Chef uniforms, wereAuthorities speculated today as found in a wooded area in an found Sunday afternoon inmany as three persons were adjacent county. northern Johnson County, a fewinvolved in the slayings of four The bodies of the four, still mile? jouth of the Indianapolisyoung employees of a fast-food wearingtheirorange-and-brown area.They were kidnapped aboutmidnight Friday during an apparent robbery. Police said $500 was missing from the Burger Chef restaurant where all four were employed.The dead were Jayne C. Friedt, 20, assistant manager of the restaurant; Ruth Ellen Shelton, 17; Daniel R. Davis and Mark Flemmonds, both 16.Officials said Miss Shelton and Davis were shot in the* 41back of the head as they lay face down, next to each other. Miss Friedt was stabbed to death and Flemmonds died of severe head injuries.No other details were disclosed and Johnson County Prosecutor D. Charles Gantz, whose office was in charge ofthe investigation, declined further comment.Police said, however, none of the victims was gagged or bound.Meanwhile, Burger Chef and another Indianapolis-based fast-food chain, Steak-And-Shake, posted rewards of $26,000 forthe kidnapper-killersAuthorities theorized the four were slain where their bodies were found, shortly after therobbery-kidnapping.The bodies of Miss Friedt and Flemmonds were found about 100 yards from the other two.Indiana State Police said investigators from Oklahoma were scheduled to arrive in Indianapolis today ‘ to compare notes.” Six persons were killed last June 18 in a small steak house holdup in Oklahoma City. The crime was also still unsolved.Police also said plaster casts of tiro impressions were made at the spots where the bodies were found. The area remained under 24-hour guard and “off limits” to the curious.