a non guilty plea has been entered for coberger. his next court appearance is scheduled in mid-may. no trial date has yet been set. >> new questions are being raised. in the case of riley strain, the college student who recently was found dead in nashville. police called his death an accident, but his family is now coming forward with doubts. here's abc's andrea fujii this morning we're hearing from the family of riley strain the university of missouri student whose body was found in a nashville river after a night out with fraternity brothers. >> strain had gone to several bars the night of march 8th, later seen stumbling and falling , his mother now telling news nation she got a text from him, raising concern that one of his drinks may have been spiked. >> he was drinking a rum and coke and it didn't taste good, and i said, well, you probably shouldn't drink it. then he goes, well, it tastes like barbecue. and i go, well, that sounds awful. and he said, well, it sounds good, but it's not. >> strain was missing for two weeks until his body was found in the cumberland river. his dea