A medical services company enlisted to help New York City manage an influx of thousands of immigrants is now under investigation by the state’s attorney general for possible violations of state or federal laws over the treatment of people in its care, according to correspondence obtained by The New York Times. New York officials raised eyebrows when the city first turned to the company, DocGo, for help in sheltering and providing other services to homeless migrants. Until last year, the company had mostly focused on providing Covid tests and vaccinations under contracts with the city and its public hospital system....