a 36 year old woman and her three children were reportedly killed by the woman's incarcerated boyfriend during a trip to see him in prison 40 year old domingo villa arellano, who is an ex cop, allegedly carried out the slayings on march 15 inside puente grande prison, el excelsior reported puente grande is a maximum security prison in jalisco, mexico a 36 year old woman and her three children were reportedly killed by the woman's incarcerated boyfriend during a trip to see him at puente grande prison (seen in this file photo) according to el excelsior, villa arellano said he stabbed  his girlfriend ericka isela velazquez cocula's chest with a weapon during a verbal dispute villa arellano reportedly said he used a metal object from his time spent making handicrafts el excelsior reported that at the time, villa arellano was furious over the couple's two children saying their mother was treating them poorly villa arella went after the children and his girlfriend's 17 year old daughter, el excelsior reported the girl got away and died at a hospital, according to the newspaper villa arellano reportedly later tried to kill himself and was hospitalized el excelsior reported that the 40 year old has been behind bars since 2006 over killing a girlfriend and sexually abusing the woman's daughter villa arellano has been behind bars since 2006 over killing a girlfriend and sexually abusing the woman's daughter (file photo)
40 year old domingo villa arellano march 15 puente grande villa arellano ericka isela velazquez cocula's 17 year old
40 year old domingo villa arellano, who is an ex cop, allegedly carried out the slayings on march 15 inside puente grande prison  villa arellano admitted to stabbing his girlfriend ericka isela velazquez cocula's chest with a weapon during a verbal dispute  villa arellano was furious over the couple's two children saying their mother was treating them poorly  he went after the children and his girlfriend's 17 year old daughter 