A jury found a Long Island attorney guilty yesterday of stealing more than $300,000 from the families he promised to help adopt children who did not actually exist.

The Nassau County Court jury deliberated for about a day before finding Kevin Cohen, 42, a Roslyn lawyer, guilty of 37 counts, including second-degree grand larceny, 11 counts of third-degree grand larceny and 10 counts of third-degree forgery.