A PORT CHARLOTTE MAN WHO IS A REGISTERED SEX OFFENDER WAS ARRESTED MONDAY FOR HAVING SEX WITH A 13 YEAR OLD GIRL AS A RESULT OF SEXTING TEXT MESSAGES.  DEPUTIES SAY THE MOTHER OF THE GIRL FOUND MESSAGES ON HER CELL PHONE FROM ANOTHER STUDENT ABOUT HANGING OUT WITH A 26 YEAR OLD MAN AFTER SHE WAS NOT AT SCHOOL BACK ON MAY 20TH.  THE MOTHER TOLD DETECTIVES HER DAUGHTER LEFT HOME ON MAY 17TH AND RETURNED EARLY THE NEXT MORNING.  THE SHERIFF’S OFFICE TALKED TO THE 14 YEAR OLD FRIEND WHO SAID THE MAN’S NAME WAS “WILL” AND THAT HE HAD ASKED HER TO SPEND THE NIGHT WITH HIM, WHICH SHE DID NOT.  DETECTIVES THEN MET WITH THE MOTHER’S DAUGHTER WHO SAID SHE HAD BEEN TEXTING “WILL,” IDENTIFIED AS 26 YEAR OLD WILLIAM ALVARADO AND HE ASKED HER TO MEET HIM.  THEY MET AND WENT TO HIS APARTMENT WHERE THERE WERE OTHERS SMOKING WEED AND DRINKING.  THEY WENT TO A BEDROOM AND HAD SEX.  THE GIRL PICKED ALVARADO OUT OF A PHOTO LINE-UP, AND HE WAS CHARGED WITH LEWD AND LASCIVIOUS BATTERY AND LEWD AND LASCIVIOUS MOLESTATION.  HE IS BEING HELD WITHOUT BOND IN THE CHARLOTTE COUNTY JAIL AS THIS IS HIS 11TH BOOKING WITH 15 RECORDS.