Complex sentence: At this time Roemer began to assemble proof that Humphreys had been intentionally fleeing the subpoena: the railroad employee who had sold Humphreys his ticket remembered what Humphreys had been wearing and described the same blue blazer that Roemer had seen while speaking to Ernest Humphreys.
Split into simpler sentences: At this time Roemer began to assemble proof that Humphreys had been intentionally fleeing the subpoena. The railroad employee who had sold Humphreys his ticket remembered what Humphreys had been wearing and described the same blue blazer that Roemer had seen while speaking to Ernest Humphreys.