Prosecutors are seeking additional charges against the Cleveland man accused of keeping three women captive in his home for a decade, they told a judge. 

At a eight-minute hearing Wednesday, Ariel Castro, 52, kept his head down, often closing his eyes and speaking only to answer "yes" or "no" to the judge's questions. 

Prosecutor Timothy McGinty told Cuyahoga County Judge Michael Russo there is a possibility of more charges. 

"We are presenting additional evidence to the grand jury next week and the week after. We expect we are going to request further indictments," he said. 

Castro faces 329 counts, including one count of aggravated murder for allegedly causing the unlawful termination of a pregnancy. 

Castro's lawyers have filed a speedy-trial motion, which would mean the case would have to be tried by August 4. However, that deadline could change if Castro's attorneys change course and ask for more time to prepare for the case. 

Russo set the next pretrial hearing for June 26 and told the prosecution and defense that any plea deal would need to be in writing. The defense has said in the past that it would be open to a plea deal if the death penalty was taken off the table. 

This week, Castro entered a not guilty plea to all charges, including 139 counts of rape and 177 counts of kidnapping Michelle Knight, Amanda Berry and Georgina "Gina" DeJesus. Castro fathered a daughter with Berry, according to authorities. 

Police have alleged Knight was impregnated by Castro five times, but he would punch her in the stomach, resulting in miscarriages and termination of all the pregnancies. 
what did someone allegedly do?
who is he?
from where?
how old is he?
how long were the women captive?
who is the county attorney?
who is the judge?
what county?
will there be more charges?
how many charges is he looking at?
what are some charges?
for what?
what did his attorney file?
what does that mean?
could that change?
how?
and do what?
for what?
when is the next court date?
for what?
kept three women captive
keeping three women captive
Ariel Castro
 Ariel Castro
Cleveland
Cleveland
52
52
a decade
 a decade
Timothy McGinty
 Timothy McGinty
Judge Michael Russo
Judge Michael Russo
Cuyahoga
Cuyahoga
more charges
more charges
329
 329
aggravated murder
aggravated murder
allegedly causing the unlawful termination of a pregnancy
allegedly causing the unlawful termination of a pregnancy
a speedy-trial motion
 a speedy-trial motion
the case would have to be tried by August 4
the case would have to be tried by August 4
yes
 could change
if Castro's attorneys change course
 if Castro's attorneys change course
ask for more time to prepare
 ask for more time to prepare
the case
the case
June 26
June 26
a pretrial hearing
pretrial hearing