
491 P.2d 627 (1971)
STATE of Oregon, Respondent,
v.
Larry Vern CATE, Appellant.
Court of Appeals of Oregon, Department 2.
Argued and Submitted September 27, 1971.
Decided December 9, 1971.
Rehearing Denied January 4, 1972.
Review Denied February 23, 1972.
*628 Monte C. McKeehen, Certified Law Student, Eugene, argued the cause for appellant. With him on the brief were Jon A. Joseph, Supervising Atty., and Ronald J. Jarman, Certified Law Student, Eugene.
Thomas H. Denney, Asst. Atty. Gen., Salem, argued the cause for respondent. On the brief were Lee Johnson, Atty. Gen., and John W. Osburn, Sol. Gen., Salem.
Before SCHWAB, C.J., and FOLEY and FORT, Judges.
FORT, Judge.
Defendant, having waived a jury, was convicted by the court of illegal possession of narcotics. ORS 474.020. He appeals, and assigns as error denial of his motion to suppress evidence.
The evidence of the police officer alone was sufficient to establish the following:
During business hours on the morning of July 8, 1970, Oregon State Police Officer Veteto had occasion to telephone Mrs. Margaret Whitsell about certain matters unrelated to this charge. During that conversation Mrs. Whitsell asked Office Veteto to meet her. Concerning that meeting, Officer Veteto testified:
"* * * I didn't know what she [Mrs. Whitsell] wanted to see me about. It wasn't until I met her at the parking lot at the Bi-Mart at Springfield that we talked about other matters, and then she said the reason she wanted to see me was because she found some narcotics in her house [in a room then occupied by the defendant], and she wanted me to take it out of there."
After meeting with Mrs. Whitsell, Officer Veteto proceeded to the Whitsell home located at 3411 Marcola Road, Springfield. Upon arriving, Officer Veteto spoke with both Mr. and Mrs. Whitsell, and
"* * * Mr. Whitsell requested that I * * * take some action about getting any drugs or narcotics out of the house, and at that time I asked them if they had any objection to me looking for that type of thing in their house, and I was assured that I had their permission to go ahead in their house and go clear through it if I wanted to.
"But as it happened, I did not, and Mrs. Whitsell said she knew where the marijuana was, that she had seen it * * *.
"And so I went went in the house. I had her sign a little note in my notebook."
The "little note" which Mrs. Whitsell signed read, "I hereby give my permission to Officer Cleve M. Veteto of the Oregon State Police to search my house at 3411 Marcola Road, Springfield, Oregon, for the presences of illegal drugs or narcotics." Mrs. Whitsell then led Officer Veteto to the bedroom where the defendant had stayed the previous night. Pointing to a pair of pants lying on the floor of the bedroom Mrs. Whitsell said, "There's the trousers, and you can see marijuana." As to what then occurred, Officer Veteto testified on cross-examination as follows:
"Q [Mr. Joseph] In order to identify it [the marihuana] she must have taken it out of the pocket?
"A Well, I had formed my opinion of what it was before I took it out. I could see what it was, but I did take it out, and then I put it back.
"Q How far was it? You said it was obvious to your view 
"A Yes.
"Q  from where you were standing?

*629 "A Yes.
"* * * * * *
"Q Are you indicating what? About four inches?
"A Yes. I think a baggy is three and one-half or four inches in width.
"Q All right. Now could you see the top part of the baggy, or could you 
"A Yes.
"Q Or could you actually see the marijuana ... vegetable matter itself?
"A Yes, I could see the marijuana ... the contents, the vegetable matterial.
"* * * * * *
"Q It was half in and half out of the pocket?
"A Yes.
"* * * * * *
"Q Where were you when you first noticed the marijuana?
"A Standing a couple of feet away directly over the trousers."
Shortly thereafter the defendant came into the Whitsell house. After he received the Miranda[1] warning he acknowledged to the officer that the trousers containing the baggy of marihuana were his. He was then arrested.
The evidence of the officer was also sufficient to establish that the defendant was a guest in the Whitsell home, having stayed there the previous night.
Here the owner of a private home simply observed a baggy of marihuana in plain view protruding from the pocket of a pair of trousers left by her guest in a heap upon the floor of the bedroom he was occupying. There is no contention that she did not have a right to be in the room. She notified the police, took an officer to her home and into the bedroom, pointed out the trousers and the baggy and asked the officer to remove it from her home. The baggy of marihuana was in plain view of both the officer and Mrs. Whitsell before the officer seized it. The motion was correctly denied. State v. Jones, Or. App., 91 Adv.Sh. 1691, 479 P.2d 1020 (1971); State v. Huddleston, Or. App., 91 Adv.Sh. 1815, 480 P.2d 454 (1971).
During the trial Mrs. Whitsell was called as a witness. Because she refused to answer a question propounded on cross-examination concerning the identity of the person who had told her of the defendant's current possession of narcotics, the state, rather than to risk her being held in contempt, moved to strike all of her testimony. The court did so, and directed her to remain in attendance upon the court so that the defendant might call her, should he desire to do so. The defendant moved for a mistrial, and the motion was denied. The defendant elected not to call her as a witness, despite the fact that the court had previously made clear to him that
"* * * if you establish this witness is, in effect, hostile, you are entitled to the same, shall we say, techniques of examination as you would have on cross-examination."
Defendant also assigns as error the failure of the court to grant the mistrial.
In the granting or refusing of a motion for mistrial, the trial court has wide discretion. Such a ruling will only be upset upon a showing of abuse thereof. State v. Kelly, Or. App., 92 Adv.Sh. 467, 482 P.2d 748 (1971); State v. James Edward Smith, Or. App., 91 Adv.Sh. 1291, 478 P.2d 417 (1970). No such showing was here made.
Furthermore, a trial judge sitting as a trier of fact is presumed not to be prejudiced by irrelevant, inadmissible evidence. State v. Voshell, 247 Or. 534, 430 P.2d 1010 (1967); Lenahan v. Leach, 245 Or. 496, 422 P.2d 683 (1967); State v. Carnathan, 2 Or. App. 67, 465 P.2d 899 (1970). There is no showing of prejudice *630 here.[2] The record, absent the stricken testimony, amply supported the judgment of the trial court.
The judgment is affirmed.
NOTES
[1]  Miranda v. Arizona, 384 U.S. 436, 86 S.Ct. 1602, 16 L.Ed.2d 694, 10 A.L.R.3d 974 (1966).
[2]  Indeed, there was already testimony from the police officer that

"* * * she knew he had used them the night before through another ... Her brother had told her about it." (Emphasis supplied.)
