A high cash bond, shifting public descriptions of the charges and a daughter’s statement now frame the case.
PHOENIX — Robert Marin’s case moved from a late-night shooting call in Waddell to a high-stakes court fight within days, with prosecutors initially describing a first-degree murder case and later reporting indicating a direct complaint alleging second-degree murder and two disorderly conduct counts.
The procedural path matters because it shows how investigators and prosecutors are building the case in public. Marin, 60, was taken into custody after deputies answered a shots-fired call near Olive Avenue and Perryville Road on March 16. He was later held on a $2 million cash bond, and the case has drawn attention because court records say his teenage daughter heard Heather Marin, 50, beg for her life before gunfire. The known facts now sit at the intersection of an arrest affidavit, a first appearance and subsequent charging reports.
At the first court stage reported by local television, prosecutors said the killing happened during a domestic violence incident and argued for a high bond by pointing to earlier alleged threats inside the marriage. That appearance put the case in the public eye as a first-degree murder prosecution. Another later report, citing a direct complaint from the Maricopa County Attorney’s Office, said the filed counts were second-degree murder plus two disorderly conduct charges tied to domestic violence. That kind of difference can reflect the gap between an arrest-stage theory and the formal counts chosen when prosecutors file. It does not by itself resolve what the final prosecution theory will be, but it does show that the case is still taking shape.
The arrest record behind those court moves is stark. Investigators say the family was already in crisis the night Heather Marin was killed. The daughter told police she had been arguing with her father earlier in the evening and that he expressed hatred toward Heather while the couple was separated and divorcing. She said he then made an angry call telling Heather he could not handle their daughter anymore and did not want her to remain at the house. After retreating to her room, the teen missed two calls from her mother. She later told deputies she heard screaming from the garage, then heard her mother say, “Please don’t kill me, please don’t kill me,” before about four shots were fired.
That witness account gave investigators a narrative they could test against the physical scene. The affidavit says the daughter opened the interior garage door and found Heather Marin bleeding on the floor while Robert Marin stood nearby with a firearm. She yelled, “Why would you do this?” and, according to investigators, he shrugged. Deputies later wrote that he walked out and returned to smoke a cigar rather than help the wounded woman. When law enforcement arrived, they reported finding blood on his clothes and shoes, as well as a firearm, a holster and spent casings in the garage. Deputies also said they noticed a strong odor of alcohol during transport.
Prosecutors appear to be working with more than only the final minutes. The affidavit says the daughter described a prior, unreported incident in early February in which her father allegedly threatened Heather Marin with a gun and threatened to kill himself. She also told investigators she had seen screenshots of hostile messages exchanged by her parents. The record further says Robert Marin owned multiple firearms that were stored around the residence, including pistols and hunting rifles, with additional weapons and ammunition kept in a safe. Those allegations could become central if prosecutors seek to show intent, state of mind or a longer pattern of intimidation.
For the defense and the court, the next issues are likely to be more technical than the initial headlines: what the final indictment or complaint contains, whether any statements by Marin are admissible, how the forensic evidence lines up with the daughter’s timeline and whether pretrial motions narrow what jurors eventually hear. Public Arizona court portals note that case information is updated over time, which means the public snapshot of the case may shift again as hearings are held and filings accumulate. At this point, the open record does not answer whether surveillance footage exists, whether there were additional eyewitnesses or when prosecutors expect to present the case to a grand jury if that step occurs.
The legal track, more than any single grim detail, now defines where the case stands. A husband is jailed, a wife is dead and a daughter’s statement anchors the allegations, but the precise shape of the prosecution will be set by the next filed documents and scheduled hearings in Maricopa County.
Author note: Last updated April 9, 2026.