Olympic champion Jacobs was determined to find his dad

Lamont Marcell Jacobs, of Italy, celebrates after winning the final of the men's 100-meters at the 2020 Summer Olympics, Sunday, Aug. 1, 2021, in Tokyo. (Alfredo Falcone/LaPresse via AP)

Lamont Jacobs of Italy crosses the finish line to win the men's the 100-meter final at the 2020 Summer Olympics, Sunday, Aug. 1, 2021, in Tokyo. (AP Photo/Matthias Schrader)

Lamont Marcell Jacobs, of Italy celebrates after winning the gold medal in the final of the men's 100-meters at the 2020 Summer Olympics, Sunday, Aug. 1, 2021, in Tokyo, Japan. (AP Photo/Martin Meissner)

Lamont Marcell Jacobs, of Italy, celebrates after winning the final of the men's 100-meters at the 2020 Summer Olympics, Sunday, Aug. 1, 2021, in Tokyo. (Alfredo Falcone/LaPresse via AP)

Lamont Marcell Jacobs, of Italy, celebrates after winning the final of the men's 100-meters at the 2020 Summer Olympics, Sunday, Aug. 1, 2021, in Tokyo. (Alfredo Falcone/LaPresse via AP)