Former assistant DA expected to challenge DA Seth Williams

Daniel Alvarez, an assistant district attorney for about eight years who worked in the gun unit and then the child support enforcement unit, is expected to be the Republican candidate for district attorney in Philadelphia this year.  Democrat Seth Williams, who was an assistant district attorney and district attorney during Alvarez's tenure, is seeking a second term.

Alvarez is now in private practice.  Linda Kerns, a family law attorney, was being courted by local Republican leaders in December to enter the race.  Kerns said Thursday that she has decided to back Alvarez for the office, calling him "an upright, moral citizen who is dedicated to his work and family."

Candidates need 1,000 signatures from registered voters in their political parties on nominating petitions to qualify for the ballot.  Tuesday was the first day to circulate petitions. March 12 is the deadline to file those petitions.