D.C. Deputy Mayor for Greater Economic Opportunity Courtney Snowden, already under scrutiny after a recent probe by the city’s inspector general found that she received preferential treatment that allowed her to circumvent the District’s public-school lottery, is now the subject of a second investigation, officials familiar with the matter said.

The second probe, also by the inspector general, focuses on whether Snowden used her government staff for babysitting and acted inappropriately when dealing with private companies that included a client of her former lobbying firm, according to the officials, who spoke on the condition of anonymity because they were not authorized to discuss a pending investigation.