FALL RIVER — A 49-year-old Fall River man was convicted Wednesday in Fall River Superior Court of sexually assaulting and raping his girlfriend's pre-teen daughter on numerous occasions during recent years, Bristol County District Attorney Thomas M. Quinn III announced.

Luis Rosa pleaded guilty in Fall River Superior Court to a multi-count indictment, charging him with one count of rape of a child with force, six counts of rape of a child-aggravated by age and one count of indecent assault and battery on a person under 14.

He was sentenced by Judge Mark Hallal to serve 14 to 15 years in state prison.

The defendant sexually assaulted the young girl on many occasions between 2013 and 2017 in the Fall River home he shared with the girl's mother. After years of abuse, the victim eventually disclosed the assaults during the summer of 2017.

The case was prosecuted by Assistant District Attorney Casey Smith.

"This is an egregious case of sexual abuse of a minor. Once again, a defendant took advantage of his position of trust as the mother's boyfriend and engaged in very offensive criminal conduct,” District Attorney Quinn said. "I commend the victim for disclosing the abuse and I hope that there is some satisfaction that the defendant has been held accountable for this outrageous conduct. He more than deserves the lengthy state prison sentence that he received."

After his eventual release from prison, the defendant will be placed on supervised probation for an additional 10 years. The conditions of his probation include:

a) The defendant shall attend sex offender treatment at his own expense as directed by the Probation Officer and as ordered by the court, at a program approved by the Probation Department, and shall remain in treatment unless and until professionally discharged by the approved sex offender therapist.

b) The defendant shall provide the Probation Department with signed releases as to any therapy/treatment he attends throughout the term of Probation.

c) The defendant shall not reside in a household with minor children (including his own);

d) The defendant shall have no unsupervised contact with minor children.

e) The defendant shall have no supervised contact with minor children unless and until the supervisor has been approved in advance by the Probation Officer and informed by Probation Officer of the offense for which the defendant is on probation and of any other sexual offense for which the defendant has been found guilty.

f) The defendant shall not be employed in a job that puts him into contact with minor children on a regular basis and all employment must be approved in advance by the Probation Officer.

g) The defendant shall not perform volunteer activities that put him into contact with children on a regular basis and all volunteer activities must be approved in advance by the Probation Officer.

h) The defendant shall not date any parent of a minor child without permission from the Probation Officer and, if permission is granted, said individual must be informed by the Probation Officer of the offense for which the defendant is on probation and of any other sexual offense for which the defendant has been found guilty.

i) The defendant shall comply with his legal obligations to register with the Sex Offender Registry Board.

j) The defendant shall be subject to GPS monitoring as required by statute for the entirety of his probation sentence with exclusion zones as to the victim when she is in Massachusetts.

k) The defendant shall have no contact, directly or indirectly with the victim.

--Bristol County District Attorney’s Office