catholic bishop david o connell, found at his home this past weekend. lawyers say the victim knew the suspect. camila bernal has more. reporter: a 65-year-old man arrested in relation to the killing of los angeles bishop david o connell. this is the husband of the bishop s housekeeper and the suspect had previously done work around the bishop s residence. reporter: less than two days after the bishop was shot and killed, a tip led investigators to carlos modena. detectives were told that they were concerned because modena was acting strange, irrational and made comments about the bishop owing him money. reporter: the l.a. county sheriff says the suspect s wife is cooperating with the investigation. meanwhile the los angeles catholic community mourning and still in shock at the loss of the beloved bishop.