that never occurred. >> reporter: hentemann then attacked the state's most glaring weakness.k of physical evidence connecting his client to containers of antifreeze. was cross-examined about the absence of any forensics. >> did you find any dna on the part of mrs. kotomski? >> no we found no dna, mr. kotomski or otherwise. >> and you found no fingerprints of mrs. kotomski on the can, correct? >> that's correct. >> reporter: teresa's attorney went after the prosecution's timeline. he got one of the state's medical witnesses to concede she couldn't tell exactly when ray drank the antifreeze. >> you don't how long he suffered from it nor do you know how much he had ingested? >> correct. >> reporter: under cross-examination the m.e. admitted he couldn't answer the question at the heart of the case. >> you don't know whether it was a homicide or you don't know whether it was a suicide. is that a fair correct? >> that is correct, yes. >> reporter: hentemann produced his own expert witness to refute the state's toxicity timeline as suspect science. >> it's impossible to determine wh

. >> reporter: another twist -- attorney hentemann asked for a bench trial, no jury. judge gary yost would alone rule on teresa's guilt or innocence. if she killed ray, or if he committed suicide. in her opening statement, prosecutor emily pelphrey attacked the idea that ray killed himself. >> he was planning for his future. he loved his grandchildren. >> reporter: the doctor who treated ray in the hospital where he died testified teresa herself said ray was not suicidal. >> she had indicated that he had feeling suicidal at that time. >> reporter: no, the state argued. this was murder. medical examiner dr. eric vey testified that antifreeze killed ray. >> he died as a result of complications of ethylene glycol toxicity. >> reporter: but exactly how antifreeze kills was critical to the state's case. >> when somebody ingests antifreeze, either deliberately or because somebody else gave it to them, what's the progression of symptoms? >> well, initially they'll appear to be drunk or stuporous. and then they'll become progressively lethargic, and then become comatose. and

teresa's lawyer, veteran trial attorney paul hentemann, was confident. >> there's no question in my view she was absolutely innocent of the crime. >> reporter: prosecutors offered teresa plea deals which would have resulted in little jail >> she was absolutely, categorically convinced that she did not commit the crime. and she felt that god was in her corner and she was not going to be convicted of -- of any crime. she did nothing wrong. >> reporter: another twist -- attorney hentemann asked for a bench trial, no jury. judge gary yost would alone rule on teresa's guilt or innocence. if she killed ray, or if he committed suicide. in her opening statement, prosecutor emily pelphrey attacked the idea that ray killed himself. >> he was planning for his future. he loved his grandchildren. >> reporter: the doctor who treated ray in the hospital where he died testified teresa herself said ray was not suicidal. >> she had indicated that he had not mentioned anything about feeling suicidal at that time. >> reporter: no, the state argued. this was murder. medical examiner dr. eric vey testified th

>>eporter: hentemann produced phis own expert witness to refutu the ate's toxici timin spest scicnce. >>s impoleo determin whenenylene`glyc may been stedue i may have been ifsted as e smaller se over an uermined period otiti. >> reptererin h close, attwrwey htuma sugge all it ountnd to at the very leaet, reablub 'm muggestg to youhat it's a suiuide..an the f f don a a up, thth you have to rule in favor of the defendant. repter: terernever t@s@ififd. hehefami anday'saited, a#a jue riredo o ambers to o h dececion. >> coming up >> i was so afraid that she s gonna get awayiwit. >> i have fith in h@r surprisehone cal >> ;an iett? hey veve o evidencn >p r rorter: stuck in a bad marriage, most peoplswallow only tir pri. pit tnsut, theygye e ckyh pon. thurayjuly 30, 2015. nthtay in asabula pupty - jury yost d r%achehehis dedeon.( the families oaccused murder teresa kotski and her dead sband rade theif way thcourthouse. - >> by the t me i iot tthe cothouse, my wle bodydwa terashshi. i wawsofaaid,e, i word up to th up to that -- almost s years. d was i was sa ra at sas gonna getway with it. ror