MADISON, Wis. -- The father of a Madison man who was killed earlier this year said Friday that he's given up on the Madison Police Department and he wants the investigation into his son's slaying to be taken up by state officials.

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Lou Marino said the disclosure Thursday about the apparent mishandling of a 911 call in connection to the killing of University of Wisconsin-Madison student Brittany Zimmermann in early April only solidifies his feelings that local law enforcement are worried more about their image rather than solving the deaths.

Some say a dispatcher mishandled the 911 call from Zimmermann when she was killed at her apartment on April 2. The dispatcher couldn't get a response on the cell phone and no police were dispatched. Zimmermann was found dead later.

Her slaying remains unsolved, as does the stabbing death of Joel Marino, 31, outside his Madison home in January.

Three months after Marino's slaying, his family said they have little faith that his slaying will be solved and that it's time to take the case to a higher level.

Lou Marino said he is "done dealing with the Madison Police Department," saying that after more than 90 days since his son's killing he has gotten no sense that police are close to any significant information.

"We want people to know -- this is what you're up against. It's wrong," said Debbie Marino, Joel's stepmother.

Marino said he and his wife have contacted Wisconsin Attorney General J.B. Van Hollen to explore ways to expedite the investigation into his son Joel's death.

"I've spoken to the mayor, detectives (and) police. I don't want to do anything to jeopardize my son's case, but it's time to meet with the attorney general to move this case forward," he said.

Lou and Debbie Marino said that they spoke with law enforcement officials about two and a half weeks ago and police asked them to give the department more time and not to spoil any potential evidence by expressing their frustrations publically.

Lou Marino said Friday that he feels that time is now up.

Lou Marino said the police department has not followed up on leads the family has provided in a timely manner, and that the police department won't bring in any outside help, which he said is long overdue.

"All of this, when it adds up, we look and we go, 'How many things can go wrong?' A number of things have gone wrong," Lou Marino said.

He said Thursday's revelations that a 911 dispatcher hung up on a call from 21-year-old Zimmermann's cell phone sometime before her death brought back memories and even more pain. When news broke about this information, it sparked a round of recriminations between the Madison Police Department, the Dane County 911 Center and Dane County officials over procedures and whether an officer should have been sent to follow up on the call.

"I want this to move forward. I want my son and Zimmerman to get justice. I can't have this at the expensive of politics and finger-pointing between two departments," he said. Lou Marino said that he wants action.

"We can't sit by. And every day that goes by, there's a lesser chance that they'll find my son's murderer. I'm up to 90 days. I haven't seen anything promising," he said. "My family is bleeding, and (police) are just opening the wounds."

The Marinos said they specifically want to talk to the attorney general about DNA evidence and speeding up the process at the state crime lab.

The Attorney General's Office confirmed that it has been in contact with the Marino family. Staff said they are working on determining who will meet with the family and how the Attorney General's Office might be able to help.

The Madison Police Department could not be reached for comment Friday night.

The Marino family urged anyone with tips or possible information in Joel Marino's death to call Crime Stoppers at 608-266-6014. Callers can remain anonymous.

The reward fund for information in Joel Marino's death is at $43,000.

Stay tuned to WISC-TV and Channel 3000 for continuing coverage.