Two North Texas senior centers are facing lawsuits, alleging staff tried to hide a string of suspicious deaths, believed to be committed by an illegal immigrant from Kenya posing as a maintenance worker. 46 year old Billy Chemirmir has been in jail since last year on charges he robbed and killed a dozen elderly people at senior centers in Collin and Dallas counties. Now, the families of six more people are suing the Tradition-Prestonwood in Dallas, saying the complex tried to hide suspicious deaths.