Doug Schneider

USA TODAY NETWORK-Wisconsin

Since she began representing Steven Avery, Kathleen Zellner hasn't been shy about using Twitter to share her theories and feelings about her client's conviction in the 2005 murder of photographer Teresa Halbach.

Sunday's tweet, though, took her efforts to a new level.

The suburban Chicago attorney declared that cellphone tower records "provide airtight alibi for" Avery: "She left property he didn't."

The tweet seems to say that Halbach's phone was used after her visit to Avery's Manitowoc County auto-salvage yard, where she had gone to photograph a car that Avery said he wanted to list for sale.

Cell-tower records we've seen in other cases can be used to show a user's movement as his or her phone uses different towers as the person drives through an area. What they don't necessarily show is who was using the phone at the time.

As of Monday morning, Zellner had not elaborated about why she believes the evidence equates to an airtight alibi.

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Zellner wasn't the only Avery attorney making news this weekend, though.

Dean Strang, one half of the team that defended Avery in his trial for Halbach's murder, spoke with Ted Perry at Milwaukee's Fox-6. Strang urged people who want to make a difference in the legal system to meet their obligations when they are called for jury duty.

He also dropped this news, which may or may not surprise you: While state lawmakers in Minnesota (and Tennessee, as we already know) are using questions raised in the documentary to consider changes in the legal system — for example, prohibiting juvenile defendants from being interrogated without an attorney present — Wisconsin lawmakers so far are not.

"While Strang's office is a block-and-a-half away from Wisconsin's Capitol," Perry writes, "not a single lawmaker there has reached out."

He contrasts that with Strang's description of reaction in the Minnesota legislature.

"There was a bi-partisan group of Minnesota legislators. When I sat down in the Minnesota Capitol — I thought we had a very positive discussion. I'd like to see the same thing happen here," Strang said.

My colleague John Ferak filed some quality reporting work over the past several days.

One story examines how often evidence-planting claims arise. Many critics of the Avery investigation believe that authorities planted a key to Halbach's SUV inside Avery's trailer. They also theorize that Avery's DNA was placed on the key, perhaps by an investigator who hoped to tie Avery to the murder victim.

Ferak's other piece explains that USA Today Network-Wisconsin reporters have used open records law to acquire videos from Avery's $36 million civil lawsuit against Manitowoc County stemming from his wrongful conviction for a 1985 rape of a jogger on the Manitowoc lakefront.

dschneid@greenbaypressgazette.com and follow him on Twitter @PGDougSchneider