1.   But that service has sometimes been tainted by suspicion.

2.   From the start, the homicide investigation was tainted by suspicions about cash and clout, and shadowed by a connection to the Kennedy family.

3.   But suspicion has tainted the deal since it was signed last March.

4.   Digel contends that many records are tainted by suspicion of drug use, but IAAF president Primo Nebiolo has described the idea as impractical.

5.   Suspicion has tainted the deal since it was signed last March.