A disbarred Lawrence lawyer has been sentenced to three years in prison and five years of probation for stealing more than $1 million from clients over a four-year period. Phillip Thompson, 35, was also ordered to pay $986,000 in restitution. Between 2007 and 2011, Thompson is said to have manipulated refinancing transactions in his real estate practice, bilking several clients out of hundreds of thousands of dollars. Among his victims were an elderly couple owed an insurance settlement following a house fire, a family refinancing their home, and a Lowell bank used for his business. The Middlesex district attorney’s office began investigating Thompson in 2011, indicting him on charges later that year and in 2013.