A fisherman who developed a jealous obsession with his ex-wife before strangling her to death has been jailed for 14 years.Supreme Court heard how David DeSilva wrapped Denise Evans-Wilkinson's body up in a tablecloth, tied it with kite string and threw it in the sea.A pathologist found the 46-year-old victim had been strangled and had her own necklace stuffed down her throat.Both the victim and defendant were drug addicts whose marriage ended in 2002. Supreme Court heard how DeSilva had become obsessed and jealous over his ex in the months leading up to her death and repeatedly harassed her for sex.Prosecutors believe he tempted Ms Wilkinson to meet him with a promise of drugs before killing her.Defence lawyer Mark Pettingill said DeSilva has hazy memories of the incident in April 2011, as both he and Ms Evans-Wilkinson were high on crack cocaine.He said DeSilva accidentally killed her during rough sex.During the sentencing hearing, Director of Public Prosecutions Rory Field described that as a "false scenario".He read a victim impact statement which was filed by the victim's daughter, Danielle Thompson.Ms Thompson was just 17 years old when he mother died. She wrote: "A part of died with my Momma. This man didn't just end her life, but he ended a part of me."Addressing Puisne Judge Charles-Etta Simmons before she sentenced him, DeSilva said: "I was pretty messed up on alcohol and drugs for a long time, but I am deeply sorry for the Evans family in this matter."The judge ordered that he must serve at least half of his sentence before parole and recommended anger management counselling.The families of the defendant and victim both wept in court during this morning's proceedings.The victim's family left court without comment.