Why is Jerome selected for Vincent to Impersonate.

Jerome Eugene Morrow is the individual whom Vincent is posing as using samples of hair, blood, urine, etc. Once an accomplished swimmer, Jerome became depressed after placing second in a competition, and attempted suicide by jumping in front of a car, leading to his paralysis. The incident occurred abroad and is unrecorded; therefore, Jerome’s nearly-flawless genotype is ideal for deceiving Gattaca. Jerome had pretty much dropped out of society so he was easier for Vincent to take on his identity.