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FILE PHOTO — Firefighters battle an arson fire at 14 N. Plum St. the morning of Dec. 6, 2010. Olga Sanchez-Reyes died in the blaze, which also injured two children. Police charged Carlos Montalvo-Rivera on Wednesday with homicide, arson and several other felony and misdemeanor offenses.

Police say they have arrested the killer in one of Lancaster's most notorious cold cases: the December 2010 arson in which Olga Sanchez-Reyes, a young mother of three, burned to death.

The man they charged: her husband, Carlos Montalvo-Rivera, described in charging documents filed Wednesday as a "very jealous man" who allegedly told his 30-year-old wife a year before her slaying that he would "kill her like a dog."

Husband charged in 2010 arson that killed Olga Sanchez-Reyes, mother of three [update]

Montalvo-Rivera, 52, was committed to Lancaster County Prison at 1 p.m. Thursday, records show. He is charged with homicide, three counts of attempted homicide and aggravated assault, arson and several related offenses.

Watch the press conference on the arrest below, or on the LNP | LancasterOnline Facebook page.

Montalvo-Rivera's arrest is among several dramatic breakthroughs in some of the county's most sensational unsolved homicides in recent years. It joins the 2018 arrest in the 25-year-old slaying and sexual assault of schoolteacher Christy Mirack and, earlier this year, the release of composite sketches investigators hope will solve the 1975 slaying of 19-year-old Lindy Sue Biechler, who died with a butcher knife in her neck.

More coverage of the homicide: