Alexander van der Zwaan, a former associate at Skadden, Arps, Slate, Meagher & Flom, was sentenced Tuesday to 30 days in jail for repeatedly lying to the special counsel team investigating Russia’s interference in the 2016 presidential election.

Van der Zwaan, 33, pleaded guilty in February to a single charge that he lied about past communications with former Trump campaign deputy Rick Gates and an unnamed Ukrainian associate of Paul Manafort, the former Trump campaign chairman. Van der Zwaan apologized in court Tuesday, saying: “What I did was wrong.”